Convert GIGS tests to gie format and add to CMake tests

32 files changed, 8243 insertions, 3 deletions

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 4fe1d5ad..a91492da 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -7,3 +7,34 @@ proj_add_gie_test("Axisswap" "gie/axisswap.gie")
 proj_add_gie_test("Deformation" "gie/deformation.gie")
 proj_add_gie_test("Ellipsoid" "gie/ellipsoid.gie")
 proj_add_gie_test("GDA" "gie/GDA.gie")
+
+proj_add_gie_test("GIGS-5101.1-jhs" "gigs/5101.1-jhs.gie")
+proj_add_gie_test("GIGS-5101.2-jhs" "gigs/5101.2-jhs.gie")
+proj_add_gie_test("GIGS-5101.3-jhs" "gigs/5101.3-jhs.gie")
+proj_add_gie_test("GIGS-5101.4-jhs-etmerc" "gigs/5101.4-jhs-etmerc.gie")
+#proj_add_gie_test("GIGS-5101.4-jhs" "gigs/5101.4-jhs.gie")
+proj_add_gie_test("GIGS-5102.1" "gigs/5102.1.gie")
+#proj_add_gie_test("GIGS-5102.2" "gigs/5102.2.gie")
+proj_add_gie_test("GIGS-5103.1" "gigs/5103.1.gie")
+proj_add_gie_test("GIGS-5103.2" "gigs/5103.2.gie")
+proj_add_gie_test("GIGS-5103.3" "gigs/5103.3.gie")
+proj_add_gie_test("GIGS-5104" "gigs/5104.gie")
+#proj_add_gie_test("GIGS-5105.1" "gigs/5105.1.gie")
+proj_add_gie_test("GIGS-5105.2" "gigs/5105.2.gie")
+proj_add_gie_test("GIGS-5106" "gigs/5106.gie")
+proj_add_gie_test("GIGS-5107" "gigs/5107.gie")
+#proj_add_gie_test("GIGS-5108" "gigs/5108.gie")
+proj_add_gie_test("GIGS-5109" "gigs/5109.gie")
+#proj_add_gie_test("GIGS-5110" "gigs/5110.gie")
+proj_add_gie_test("GIGS-5111.1" "gigs/5111.1.gie")
+#proj_add_gie_test("GIGS-5111.2" "gigs/5111.2.gie")
+proj_add_gie_test("GIGS-5112" "gigs/5112.gie")
+#proj_add_gie_test("GIGS-5113" "gigs/5113.gie")
+#proj_add_gie_test("GIGS-5201" "gigs/5201.gie")
+#proj_add_gie_test("GIGS-5203" "gigs/5203.1.gie")
+#proj_add_gie_test("GIGS-5204.1" "gigs/5204.1.gie")
+#proj_add_gie_test("GIGS-5205.1" "gigs/5205.1.gie")
+#proj_add_gie_test("GIGS-5206" "gigs/5206.gie")
+#proj_add_gie_test("GIGS-5207.1" "gigs/5207.1.gie")
+#proj_add_gie_test("GIGS-5207.2" "gigs/5207.2.gie")
+#proj_add_gie_test("GIGS-5208" "gigs/5208.gie")
diff --git a/test/gigs/5101.1-jhs.gie b/test/gigs/5101.1-jhs.gie
new file mode 100644
index 00000000..2fd98883
--- /dev/null
+++ b/test/gigs/5101.1-jhs.gie
@@ -0,0 +1,732 @@
+--------------------------------------------------------------------------------
+
+Test 5101 (part 1), Transverse Mercator, v2-0_2011-06-28, recommended JHS formula
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +proj=etmerc +lat_0=49 +lon_0=-2 +k_0=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=WGS84 +units=m +no_def
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    3 80
+expect    496813.178 3358297.326
+
+tolerance  0.03 m
+accept    2.9999999 60
+expect    678711.584 1134498.83
+
+tolerance  0.03 m
+accept    3 49
+expect    765648.501 -87944.74
+
+tolerance  0.03 m
+accept    3.0000001 40
+expect    826893.845 -1087710.121
+
+tolerance  0.03 m
+accept    3 20
+expect    923539.353 -3308151.625
+
+tolerance  0.03 m
+accept    3 0
+expect    957087.829 -5527462.686
+
+tolerance  0.03 m
+accept    3 -20
+expect    923539.353 -7746773.748
+
+tolerance  0.03 m
+accept    3 -40
+expect    826893.845 -9967215.251
+
+tolerance  0.03 m
+accept    3 -60
+expect    678711.584 -12189424.202
+
+tolerance  0.03 m
+accept    3 -80
+expect    496813.178 -14413222.698
+
+tolerance  0.03 m
+accept    -2 80
+expect    400000 3354134.429
+
+tolerance  0.03 m
+accept    -2 60
+expect    400000 1123956.966
+
+tolerance  0.03 m
+accept    -2 49
+expect    400000 -100000
+
+tolerance  0.03 m
+accept    -2 40
+expect    400000 -1099699.834
+
+tolerance  0.03 m
+accept    -2 20
+expect    400000 -3315978.565
+
+tolerance  0.03 m
+accept    -2 0
+expect    400000 -5527462.686
+
+tolerance  0.03 m
+accept    -2 -20
+expect    400000 -7738946.807
+
+tolerance  0.03 m
+accept    -2 -40
+expect    400000 -9955225.538
+
+tolerance  0.03 m
+accept    -2 -60
+expect    400000 -12178882.338
+
+tolerance  0.03 m
+accept    -2 -80
+expect    400000 -14409059.801
+
+tolerance  0.03 m
+accept    -5 80
+expect    341867.711 3355633.571
+
+tolerance  0.03 m
+accept    -5 60
+expect    232704.966 1127751.264
+
+tolerance  0.03 m
+accept    -5 49
+expect    180586.02 -95662.911
+
+tolerance  0.03 m
+accept    -5 40
+expect    143900.026 -1095387.991
+
+tolerance  0.03 m
+accept    -5 20
+expect    86073.28 -3313165.843
+
+tolerance  0.03 m
+accept    -5 0
+expect    66021.018 -5527462.686
+
+tolerance  0.03 m
+accept    -5 -20
+expect    86073.28 -7741759.529
+
+tolerance  0.03 m
+accept    -5 -40
+expect    143900.026 -9959537.381
+
+tolerance  0.03 m
+accept    -5 -60
+expect    232704.966 -12182676.637
+
+tolerance  0.03 m
+accept    -5 -80
+expect    341867.711 -14410558.943
+
+tolerance  0.03 m
+accept    -7.5559037 49.7661327
+expect    0 0
+
+tolerance  0.03 m
+accept    -5 0
+expect    66021.018 -5527462.686
+
+tolerance  0.03 m
+accept    -4 0
+expect    177404.277 -5527462.686
+
+tolerance  0.03 m
+accept    -3 0
+expect    288719.208 -5527462.686
+
+tolerance  0.03 m
+accept    -2 0
+expect    400000.0 -5527462.686
+
+tolerance  0.03 m
+accept    -1 0
+expect    511280.792 -5527462.686
+
+tolerance  0.03 m
+accept    0 0
+expect    622595.723 -5527462.686
+
+tolerance  0.03 m
+accept    1 0
+expect    733978.982 -5527462.686
+
+tolerance  0.03 m
+accept    2 0
+expect    845464.865 -5527462.686
+
+tolerance  0.03 m
+accept    3 0
+expect    957087.829 -5527462.686
+
+tolerance  0.03 m
+accept    4 0
+expect    1068882.539 -5527462.686
+
+tolerance  0.03 m
+accept    5 0
+expect    1180883.933 -5527462.686
+
+tolerance  0.03 m
+accept    6 0
+expect    1293127.266 -5527462.686
+
+tolerance  0.03 m
+accept    7 0
+expect    1405648.179 -5527462.686
+
+tolerance  0.03 m
+accept    8 0
+expect    1518482.747 -5527462.686
+
+tolerance  0.03 m
+accept    -5 60
+expect    232704.966 1127751.264
+
+tolerance  0.03 m
+accept    -4 60
+expect    288455.816 1125643.213
+
+tolerance  0.03 m
+accept    -3 60
+expect    344223.662 1124378.512
+
+tolerance  0.03 m
+accept    -2 60
+expect    400000 1123956.966
+
+tolerance  0.03 m
+accept    -1 60
+expect    455776.338 1124378.512
+
+tolerance  0.03 m
+accept    0 60
+expect    511544.184 1125643.213
+
+tolerance  0.03 m
+accept    1 60
+expect    567295.034 1127751.264
+
+tolerance  0.03 m
+accept    2 60
+expect    623020.357 1130702.987
+
+tolerance  0.03 m
+accept    3 60
+expect    678711.584 1134498.83
+
+tolerance  0.03 m
+accept    4.0 60.0
+expect    734360.093 1139139.367
+
+tolerance  0.03 m
+accept    5.0 60.0
+expect    789957.197 1144625.296
+
+tolerance  0.03 m
+accept    6.0 60.0
+expect    845494.132 1150957.434
+
+tolerance  0.03 m
+accept    7.0 60.0
+expect    900962.042 1158136.713
+
+tolerance  0.03 m
+accept    8.0 60.0
+expect    956351.967 1166164.18
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +proj=etmerc +lat_0=49 +lon_0=-2 +k_0=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=WGS84 +units=m +no_def +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    496813.178 3358297.326
+expect    3 80
+
+tolerance  0.03 m
+accept    678711.584 1134498.83
+expect    2.9999999 60
+
+tolerance  0.03 m
+accept    765648.501 -87944.74
+expect    3 49
+
+tolerance  0.03 m
+accept    826893.845 -1087710.121
+expect    3.0000001 40
+
+tolerance  0.03 m
+accept    923539.353 -3308151.625
+expect    3 20
+
+tolerance  0.03 m
+accept    957087.829 -5527462.686
+expect    3 0
+
+tolerance  0.03 m
+accept    923539.353 -7746773.748
+expect    3 -20
+
+tolerance  0.03 m
+accept    826893.845 -9967215.251
+expect    3 -40
+
+tolerance  0.03 m
+accept    678711.584 -12189424.202
+expect    3 -60
+
+tolerance  0.03 m
+accept    496813.178 -14413222.698
+expect    3 -80
+
+tolerance  0.03 m
+accept    400000 3354134.429
+expect    -2 80
+
+tolerance  0.03 m
+accept    400000 1123956.966
+expect    -2 60
+
+tolerance  0.03 m
+accept    400000 -100000
+expect    -2 49
+
+tolerance  0.03 m
+accept    400000 -1099699.834
+expect    -2 40
+
+tolerance  0.03 m
+accept    400000 -3315978.565
+expect    -2 20
+
+tolerance  0.03 m
+accept    400000 -5527462.686
+expect    -2 0
+
+tolerance  0.03 m
+accept    400000 -7738946.807
+expect    -2 -20
+
+tolerance  0.03 m
+accept    400000 -9955225.538
+expect    -2 -40
+
+tolerance  0.03 m
+accept    400000 -12178882.338
+expect    -2 -60
+
+tolerance  0.03 m
+accept    400000 -14409059.801
+expect    -2 -80
+
+tolerance  0.03 m
+accept    341867.711 3355633.571
+expect    -5 80
+
+tolerance  0.03 m
+accept    232704.966 1127751.264
+expect    -5 60
+
+tolerance  0.03 m
+accept    180586.02 -95662.911
+expect    -5 49
+
+tolerance  0.03 m
+accept    143900.026 -1095387.991
+expect    -5 40
+
+tolerance  0.03 m
+accept    86073.28 -3313165.843
+expect    -5 20
+
+tolerance  0.03 m
+accept    66021.018 -5527462.686
+expect    -5 0
+
+tolerance  0.03 m
+accept    86073.28 -7741759.529
+expect    -5 -20
+
+tolerance  0.03 m
+accept    143900.026 -9959537.381
+expect    -5 -40
+
+tolerance  0.03 m
+accept    232704.966 -12182676.637
+expect    -5 -60
+
+tolerance  0.03 m
+accept    341867.711 -14410558.943
+expect    -5 -80
+
+tolerance  0.03 m
+accept    0 0
+expect    -7.5559037 49.7661327
+
+tolerance  0.03 m
+accept    66021.018 -5527462.686
+expect    -5 0
+
+tolerance  0.03 m
+accept    177404.277 -5527462.686
+expect    -4 0
+
+tolerance  0.03 m
+accept    288719.208 -5527462.686
+expect    -3 0
+
+tolerance  0.03 m
+accept    400000.0 -5527462.686
+expect    -2 0
+
+tolerance  0.03 m
+accept    511280.792 -5527462.686
+expect    -1 0
+
+tolerance  0.03 m
+accept    622595.723 -5527462.686
+expect    0 0
+
+tolerance  0.03 m
+accept    733978.982 -5527462.686
+expect    1 0
+
+tolerance  0.03 m
+accept    845464.865 -5527462.686
+expect    2 0
+
+tolerance  0.03 m
+accept    957087.829 -5527462.686
+expect    3 0
+
+tolerance  0.03 m
+accept    1068882.539 -5527462.686
+expect    4 0
+
+tolerance  0.03 m
+accept    1180883.933 -5527462.686
+expect    5 0
+
+tolerance  0.03 m
+accept    1293127.266 -5527462.686
+expect    6 0
+
+tolerance  0.03 m
+accept    1405648.179 -5527462.686
+expect    7 0
+
+tolerance  0.03 m
+accept    1518482.747 -5527462.686
+expect    8 0
+
+tolerance  0.03 m
+accept    232704.966 1127751.264
+expect    -5 60
+
+tolerance  0.03 m
+accept    288455.816 1125643.213
+expect    -4 60
+
+tolerance  0.03 m
+accept    344223.662 1124378.512
+expect    -3 60
+
+tolerance  0.03 m
+accept    400000 1123956.966
+expect    -2 60
+
+tolerance  0.03 m
+accept    455776.338 1124378.512
+expect    -1 60
+
+tolerance  0.03 m
+accept    511544.184 1125643.213
+expect    0 60
+
+tolerance  0.03 m
+accept    567295.034 1127751.264
+expect    1 60
+
+tolerance  0.03 m
+accept    623020.357 1130702.987
+expect    2 60
+
+tolerance  0.03 m
+accept    678711.584 1134498.83
+expect    3 60
+
+tolerance  0.03 m
+accept    734360.093 1139139.367
+expect    4.0 60.0
+
+tolerance  0.03 m
+accept    789957.197 1144625.296
+expect    5.0 60.0
+
+tolerance  0.03 m
+accept    845494.132 1150957.434
+expect    6.0 60.0
+
+tolerance  0.03 m
+accept    900962.042 1158136.713
+expect    7.0 60.0
+
+tolerance  0.03 m
+accept    956351.967 1166164.18
+expect    8.0 60.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +proj=etmerc +lat_0=49 +lon_0=-2 +k_0=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=WGS84 +units=m +no_def
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    3 80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9999999 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.0000001 40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 -40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 -80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 -40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 -80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 -40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 -80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -7.5559037 49.7661327
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -4 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -3 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -1 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -4 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -3 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -1 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8.0 60.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5101.2-jhs.gie b/test/gigs/5101.2-jhs.gie
new file mode 100644
index 00000000..7ea6275e
--- /dev/null
+++ b/test/gigs/5101.2-jhs.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5101 (part 2), Transverse Mercator, v2-0_2011-06-28, recommended JHS formula
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:32631
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -2.0 80.0
+expect    403186.945 8885748.708
+
+tolerance  0.03 m
+accept    -2.0 60.0
+expect    221288.77 6661953.041
+
+tolerance  0.03 m
+accept    -2.0 40.0
+expect    73106.698 4439746.917
+
+tolerance  0.03 m
+accept    -2.0 20.0
+expect    -23538.687 2219308.238
+
+tolerance  0.03 m
+accept    -2.0 0.0
+expect    -57087.12 0.0
+
+tolerance  0.03 m
+accept    -2.0 -20.0
+expect    -23538.687 -2219308.238
+
+tolerance  0.03 m
+accept    -2.0 -40.0
+expect    73106.698 -4439746.917
+
+tolerance  0.03 m
+accept    -2.0 -60.0
+expect    221288.77 -6661953.041
+
+tolerance  0.03 m
+accept    -2.0 -80.0
+expect    403186.945 -8885748.708
+
+tolerance  0.03 m
+accept    -5.0 60.0
+expect    54506.435 6678411.623
+
+tolerance  0.03 m
+accept    -4.0 60.0
+expect    110043.299 6672079.494
+
+tolerance  0.03 m
+accept    -3.0 60.0
+expect    165640.332 6666593.572
+
+tolerance  0.03 m
+accept    -2.0 60.0
+expect    221288.77 6661953.041
+
+tolerance  0.03 m
+accept    -1.0 60.0
+expect    276979.926 6658157.202
+
+tolerance  0.03 m
+accept    0.0 60.0
+expect    332705.179 6655205.484
+
+tolerance  0.03 m
+accept    1.0 60.0
+expect    388455.958 6653097.435
+
+tolerance  0.03 m
+accept    2.0 60.0
+expect    444223.733 6651832.735
+
+tolerance  0.03 m
+accept    3.0 60.0
+expect    500000.0 6651411.19
+
+tolerance  0.03 m
+accept    4.0 60.0
+expect    555776.267 6651832.735
+
+tolerance  0.03 m
+accept    5.0 60.0
+expect    611544.042 6653097.435
+
+tolerance  0.03 m
+accept    6.0 60.0
+expect    667294.821 6655205.484
+
+tolerance  0.03 m
+accept    7.0 60.0
+expect    723020.074 6658157.202
+
+tolerance  0.03 m
+accept    8.0 60.0
+expect    778711.23 6661953.041
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:32631 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    403186.945 8885748.708
+expect    -2.0 80.0
+
+tolerance  0.03 m
+accept    221288.77 6661953.041
+expect    -2.0 60.0
+
+tolerance  0.03 m
+accept    73106.698 4439746.917
+expect    -2.0 40.0
+
+tolerance  0.03 m
+accept    -23538.687 2219308.238
+expect    -2.0 20.0
+
+tolerance  0.03 m
+accept    -57087.12 0.0
+expect    -2.0 0.0
+
+tolerance  0.03 m
+accept    -23538.687 -2219308.238
+expect    -2.0 -20.0
+
+tolerance  0.03 m
+accept    73106.698 -4439746.917
+expect    -2.0 -40.0
+
+tolerance  0.03 m
+accept    221288.77 -6661953.041
+expect    -2.0 -60.0
+
+tolerance  0.03 m
+accept    403186.945 -8885748.708
+expect    -2.0 -80.0
+
+tolerance  0.03 m
+accept    54506.435 6678411.623
+expect    -5.0 60.0
+
+tolerance  0.03 m
+accept    110043.299 6672079.494
+expect    -4.0 60.0
+
+tolerance  0.03 m
+accept    165640.332 6666593.572
+expect    -3.0 60.0
+
+tolerance  0.03 m
+accept    221288.77 6661953.041
+expect    -2.0 60.0
+
+tolerance  0.03 m
+accept    276979.926 6658157.202
+expect    -1.0 60.0
+
+tolerance  0.03 m
+accept    332705.179 6655205.484
+expect    0.0 60.0
+
+tolerance  0.03 m
+accept    388455.958 6653097.435
+expect    1.0 60.0
+
+tolerance  0.03 m
+accept    444223.733 6651832.735
+expect    2.0 60.0
+
+tolerance  0.03 m
+accept    500000.0 6651411.19
+expect    3.0 60.0
+
+tolerance  0.03 m
+accept    555776.267 6651832.735
+expect    4.0 60.0
+
+tolerance  0.03 m
+accept    611544.042 6653097.435
+expect    5.0 60.0
+
+tolerance  0.03 m
+accept    667294.821 6655205.484
+expect    6.0 60.0
+
+tolerance  0.03 m
+accept    723020.074 6658157.202
+expect    7.0 60.0
+
+tolerance  0.03 m
+accept    778711.23 6661953.041
+expect    8.0 60.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:32631
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -2.0 80.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 40.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 20.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 -20.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 -40.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 -60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 -80.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -5.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -4.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -3.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -2.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -1.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7.0 60.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8.0 60.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5101.3-jhs.gie b/test/gigs/5101.3-jhs.gie
new file mode 100644
index 00000000..d588df4c
--- /dev/null
+++ b/test/gigs/5101.3-jhs.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5101 (part 3), Transverse Mercator, v2-0_2011-06-28, recommended JHS formula
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4283 +inv
+           +step +init=epsg:28354
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    146 80
+expect    596813.055 18885748.71
+
+tolerance  0.03 m
+accept    146 60
+expect    778711.23 16661953.04
+
+tolerance  0.03 m
+accept    146 40
+expect    926893.302 14439746.92
+
+tolerance  0.03 m
+accept    146 20
+expect    1023538.687 12219308.24
+
+tolerance  0.03 m
+accept    146 0
+expect    1057087.12 10000000.0
+
+tolerance  0.03 m
+accept    146 -20
+expect    1023538.687 7780691.762
+
+tolerance  0.03 m
+accept    146 -40
+expect    926893.302 5560253.083
+
+tolerance  0.03 m
+accept    146 -60
+expect    778711.23 3338046.96
+
+tolerance  0.03 m
+accept    146 -80
+expect    596813.055 1114251.292
+
+tolerance  0.03 m
+accept    136 -60
+expect    221288.77 3338046.96
+
+tolerance  0.03 m
+accept    137 -60
+expect    276979.926 3341842.798
+
+tolerance  0.03 m
+accept    138 -60
+expect    332705.179 3344794.516
+
+tolerance  0.03 m
+accept    139 -60
+expect    388455.958 3346902.565
+
+tolerance  0.03 m
+accept    140 -60
+expect    444223.733 3348167.265
+
+tolerance  0.03 m
+accept    141 -60
+expect    500000.0 3348588.81
+
+tolerance  0.03 m
+accept    142 -60
+expect    555776.267 3348167.265
+
+tolerance  0.03 m
+accept    143 -60
+expect    611544.042 3346902.565
+
+tolerance  0.03 m
+accept    144 -60
+expect    667294.821 3344794.516
+
+tolerance  0.03 m
+accept    145 -60
+expect    723020.074 3341842.798
+
+tolerance  0.03 m
+accept    146 -60
+expect    778711.23 3338046.96
+
+tolerance  0.03 m
+accept    147 -60
+expect    834359.668 3333406.428
+
+tolerance  0.03 m
+accept    148 -60
+expect    889956.701 3327920.506
+
+tolerance  0.03 m
+accept    149 -60
+expect    945493.565 3321588.377
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:28354 +inv
+           +step +init=epsg:4283
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    596813.055 18885748.71
+expect    146 80
+
+tolerance  0.03 m
+accept    778711.23 16661953.04
+expect    146 60
+
+tolerance  0.03 m
+accept    926893.302 14439746.92
+expect    146 40
+
+tolerance  0.03 m
+accept    1023538.687 12219308.24
+expect    146 20
+
+tolerance  0.03 m
+accept    1057087.12 10000000.0
+expect    146 0
+
+tolerance  0.03 m
+accept    1023538.687 7780691.762
+expect    146 -20
+
+tolerance  0.03 m
+accept    926893.302 5560253.083
+expect    146 -40
+
+tolerance  0.03 m
+accept    778711.23 3338046.96
+expect    146 -60
+
+tolerance  0.03 m
+accept    596813.055 1114251.292
+expect    146 -80
+
+tolerance  0.03 m
+accept    221288.77 3338046.96
+expect    136 -60
+
+tolerance  0.03 m
+accept    276979.926 3341842.798
+expect    137 -60
+
+tolerance  0.03 m
+accept    332705.179 3344794.516
+expect    138 -60
+
+tolerance  0.03 m
+accept    388455.958 3346902.565
+expect    139 -60
+
+tolerance  0.03 m
+accept    444223.733 3348167.265
+expect    140 -60
+
+tolerance  0.03 m
+accept    500000.0 3348588.81
+expect    141 -60
+
+tolerance  0.03 m
+accept    555776.267 3348167.265
+expect    142 -60
+
+tolerance  0.03 m
+accept    611544.042 3346902.565
+expect    143 -60
+
+tolerance  0.03 m
+accept    667294.821 3344794.516
+expect    144 -60
+
+tolerance  0.03 m
+accept    723020.074 3341842.798
+expect    145 -60
+
+tolerance  0.03 m
+accept    778711.23 3338046.96
+expect    146 -60
+
+tolerance  0.03 m
+accept    834359.668 3333406.428
+expect    147 -60
+
+tolerance  0.03 m
+accept    889956.701 3327920.506
+expect    148 -60
+
+tolerance  0.03 m
+accept    945493.565 3321588.377
+expect    149 -60
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4283 +inv
+           +step +init=epsg:28354
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    146 80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 -40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 -80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    136 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    137 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    138 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    139 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    141 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    142 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    143 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    144 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    145 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    146 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    147 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    148 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    149 -60
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5101.4-jhs-etmerc.gie b/test/gigs/5101.4-jhs-etmerc.gie
new file mode 100644
index 00000000..b97b7769
--- /dev/null
+++ b/test/gigs/5101.4-jhs-etmerc.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5101 (part 4), Transverse Mercator, v2-0_2011-06-28, recommended JHS formula
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4190 +inv
+           +step +proj=etmerc +lat_0=-90 +lon_0=-60 +k=1 +x_0=5500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -63.9993433 80.0002644
+expect    5422500.0 18889800.0
+
+tolerance  0.03 m
+accept    -63.9998472 60.0001191
+expect    5276900.0 16662800.0
+
+tolerance  0.03 m
+accept    -63.9997361 40.0003081
+expect    5158399.999 14439199.99
+
+tolerance  0.03 m
+accept    -64.0004605 19.9996448
+expect    5081100.0 12219300.0
+
+tolerance  0.03 m
+accept    -63.9996186 0.0003092
+expect    5054400.005 10002000.0
+
+tolerance  0.03 m
+accept    -64.0004675 -19.9999283
+expect    5081100.017 7784599.993
+
+tolerance  0.03 m
+accept    -63.9997001 -39.9996924
+expect    5158400.0 5564800.0
+
+tolerance  0.03 m
+accept    -63.9998814 -60.0004008
+expect    5276899.994 3341099.995
+
+tolerance  0.03 m
+accept    -63.9991006 -79.9996521
+expect    5422500.0 1114200.0
+
+tolerance  0.03 m
+accept    -70.0002089 -40.000215
+expect    4645300.113 5524200.123
+
+tolerance  0.03 m
+accept    -69.0001441 -40.0002935
+expect    4730900.0 5533400.0
+
+tolerance  0.03 m
+accept    -67.9995333 -39.9996136
+expect    4816500.043 5541700.028
+
+tolerance  0.03 m
+accept    -66.9998073 -39.9999313
+expect    4902000.0 5548900.0
+
+tolerance  0.03 m
+accept    -65.9996522 -39.9995894
+expect    4987500.009 5555200.001
+
+tolerance  0.03 m
+accept    -64.9992796 -40.000411
+expect    5073000.0 5560400.0
+
+tolerance  0.03 m
+accept    -63.9997 -39.9996925
+expect    5158400.01 5564799.987
+
+tolerance  0.03 m
+accept    -62.9999842 -40.0002087
+expect    5243800.0 5568100.0
+
+tolerance  0.03 m
+accept    -62.0000778 -40.0001803
+expect    5329199.995 5570500.009
+
+tolerance  0.03 m
+accept    -61.0000574 -39.9996182
+expect    5414600.0 5572000.0
+
+tolerance  0.03 m
+accept    -60.0 -40.0003306
+expect    5500000.0 5572399.996
+
+tolerance  0.03 m
+accept    -58.9999426 -39.9996182
+expect    5585400.0 5572000.0
+
+tolerance  0.03 m
+accept    -57.9999222 -40.0001803
+expect    5670800.005 5570500.009
+
+tolerance  0.03 m
+accept    -57.0000158 -40.0002087
+expect    5756200.0 5568100.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +proj=etmerc +lat_0=-90 +lon_0=-60 +k=1 +x_0=5500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +inv
+           +step +init=epsg:4190
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    5422500.0 18889800.0
+expect    -63.9993433 80.0002644
+
+tolerance  0.03 m
+accept    5276900.0 16662800.0
+expect    -63.9998472 60.0001191
+
+tolerance  0.03 m
+accept    5158399.999 14439199.99
+expect    -63.9997361 40.0003081
+
+tolerance  0.03 m
+accept    5081100.0 12219300.0
+expect    -64.0004605 19.9996448
+
+tolerance  0.03 m
+accept    5054400.005 10002000.0
+expect    -63.9996186 0.0003092
+
+tolerance  0.03 m
+accept    5081100.017 7784599.993
+expect    -64.0004675 -19.9999283
+
+tolerance  0.03 m
+accept    5158400.0 5564800.0
+expect    -63.9997001 -39.9996924
+
+tolerance  0.03 m
+accept    5276899.994 3341099.995
+expect    -63.9998814 -60.0004008
+
+tolerance  0.03 m
+accept    5422500.0 1114200.0
+expect    -63.9991006 -79.9996521
+
+tolerance  0.03 m
+accept    4645300.113 5524200.123
+expect    -70.0002089 -40.000215
+
+tolerance  0.03 m
+accept    4730900.0 5533400.0
+expect    -69.0001441 -40.0002935
+
+tolerance  0.03 m
+accept    4816500.043 5541700.028
+expect    -67.9995333 -39.9996136
+
+tolerance  0.03 m
+accept    4902000.0 5548900.0
+expect    -66.9998073 -39.9999313
+
+tolerance  0.03 m
+accept    4987500.009 5555200.001
+expect    -65.9996522 -39.9995894
+
+tolerance  0.03 m
+accept    5073000.0 5560400.0
+expect    -64.9992796 -40.000411
+
+tolerance  0.03 m
+accept    5158400.01 5564799.987
+expect    -63.9997 -39.9996925
+
+tolerance  0.03 m
+accept    5243800.0 5568100.0
+expect    -62.9999842 -40.0002087
+
+tolerance  0.03 m
+accept    5329199.995 5570500.009
+expect    -62.0000778 -40.0001803
+
+tolerance  0.03 m
+accept    5414600.0 5572000.0
+expect    -61.0000574 -39.9996182
+
+tolerance  0.03 m
+accept    5500000.0 5572399.996
+expect    -60.0 -40.0003306
+
+tolerance  0.03 m
+accept    5585400.0 5572000.0
+expect    -58.9999426 -39.9996182
+
+tolerance  0.03 m
+accept    5670800.005 5570500.009
+expect    -57.9999222 -40.0001803
+
+tolerance  0.03 m
+accept    5756200.0 5568100.0
+expect    -57.0000158 -40.0002087
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4190 +inv
+           +step +proj=etmerc +lat_0=-90 +lon_0=-60 +k=1 +x_0=5500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -63.9993433 80.0002644
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9998472 60.0001191
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997361 40.0003081
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.0004605 19.9996448
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9996186 0.0003092
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.0004675 -19.9999283
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997001 -39.9996924
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9998814 -60.0004008
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9991006 -79.9996521
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -70.0002089 -40.000215
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -69.0001441 -40.0002935
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -67.9995333 -39.9996136
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -66.9998073 -39.9999313
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -65.9996522 -39.9995894
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.9992796 -40.000411
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997 -39.9996925
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -62.9999842 -40.0002087
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -62.0000778 -40.0001803
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -61.0000574 -39.9996182
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -60.0 -40.0003306
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -58.9999426 -39.9996182
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -57.9999222 -40.0001803
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -57.0000158 -40.0002087
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5101.4-jhs.gie b/test/gigs/5101.4-jhs.gie
new file mode 100644
index 00000000..615bf60b
--- /dev/null
+++ b/test/gigs/5101.4-jhs.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5101 (part 4), Transverse Mercator, v2-0_2011-06-28, recommended JHS formula
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4190 +inv
+           +step +init=epsg:22175
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -63.9993433 80.0002644
+expect    5422500.0 18889800.0
+
+tolerance  0.03 m
+accept    -63.9998472 60.0001191
+expect    5276900.0 16662800.0
+
+tolerance  0.03 m
+accept    -63.9997361 40.0003081
+expect    5158399.999 14439199.99
+
+tolerance  0.03 m
+accept    -64.0004605 19.9996448
+expect    5081100.0 12219300.0
+
+tolerance  0.03 m
+accept    -63.9996186 0.0003092
+expect    5054400.005 10002000.0
+
+tolerance  0.03 m
+accept    -64.0004675 -19.9999283
+expect    5081100.017 7784599.993
+
+tolerance  0.03 m
+accept    -63.9997001 -39.9996924
+expect    5158400.0 5564800.0
+
+tolerance  0.03 m
+accept    -63.9998814 -60.0004008
+expect    5276899.994 3341099.995
+
+tolerance  0.03 m
+accept    -63.9991006 -79.9996521
+expect    5422500.0 1114200.0
+
+tolerance  0.03 m
+accept    -70.0002089 -40.000215
+expect    4645300.113 5524200.123
+
+tolerance  0.03 m
+accept    -69.0001441 -40.0002935
+expect    4730900.0 5533400.0
+
+tolerance  0.03 m
+accept    -67.9995333 -39.9996136
+expect    4816500.043 5541700.028
+
+tolerance  0.03 m
+accept    -66.9998073 -39.9999313
+expect    4902000.0 5548900.0
+
+tolerance  0.03 m
+accept    -65.9996522 -39.9995894
+expect    4987500.009 5555200.001
+
+tolerance  0.03 m
+accept    -64.9992796 -40.000411
+expect    5073000.0 5560400.0
+
+tolerance  0.03 m
+accept    -63.9997 -39.9996925
+expect    5158400.01 5564799.987
+
+tolerance  0.03 m
+accept    -62.9999842 -40.0002087
+expect    5243800.0 5568100.0
+
+tolerance  0.03 m
+accept    -62.0000778 -40.0001803
+expect    5329199.995 5570500.009
+
+tolerance  0.03 m
+accept    -61.0000574 -39.9996182
+expect    5414600.0 5572000.0
+
+tolerance  0.03 m
+accept    -60 -40.0003306
+expect    5500000.0 5572399.996
+
+tolerance  0.03 m
+accept    -58.9999426 -39.9996182
+expect    5585400.0 5572000.0
+
+tolerance  0.03 m
+accept    -57.9999222 -40.0001803
+expect    5670800.005 5570500.009
+
+tolerance  0.03 m
+accept    -57.0000158 -40.0002087
+expect    5756200.0 5568100.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:22175 +inv
+           +step +init=epsg:4190
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    5422500.0 18889800.0
+expect    -63.9993433 80.0002644
+
+tolerance  0.03 m
+accept    5276900.0 16662800.0
+expect    -63.9998472 60.0001191
+
+tolerance  0.03 m
+accept    5158399.999 14439199.99
+expect    -63.9997361 40.0003081
+
+tolerance  0.03 m
+accept    5081100.0 12219300.0
+expect    -64.0004605 19.9996448
+
+tolerance  0.03 m
+accept    5054400.005 10002000.0
+expect    -63.9996186 0.0003092
+
+tolerance  0.03 m
+accept    5081100.017 7784599.993
+expect    -64.0004675 -19.9999283
+
+tolerance  0.03 m
+accept    5158400.0 5564800.0
+expect    -63.9997001 -39.9996924
+
+tolerance  0.03 m
+accept    5276899.994 3341099.995
+expect    -63.9998814 -60.0004008
+
+tolerance  0.03 m
+accept    5422500.0 1114200.0
+expect    -63.9991006 -79.9996521
+
+tolerance  0.03 m
+accept    4645300.113 5524200.123
+expect    -70.0002089 -40.000215
+
+tolerance  0.03 m
+accept    4730900.0 5533400.0
+expect    -69.0001441 -40.0002935
+
+tolerance  0.03 m
+accept    4816500.043 5541700.028
+expect    -67.9995333 -39.9996136
+
+tolerance  0.03 m
+accept    4902000.0 5548900.0
+expect    -66.9998073 -39.9999313
+
+tolerance  0.03 m
+accept    4987500.009 5555200.001
+expect    -65.9996522 -39.9995894
+
+tolerance  0.03 m
+accept    5073000.0 5560400.0
+expect    -64.9992796 -40.000411
+
+tolerance  0.03 m
+accept    5158400.01 5564799.987
+expect    -63.9997 -39.9996925
+
+tolerance  0.03 m
+accept    5243800.0 5568100.0
+expect    -62.9999842 -40.0002087
+
+tolerance  0.03 m
+accept    5329199.995 5570500.009
+expect    -62.0000778 -40.0001803
+
+tolerance  0.03 m
+accept    5414600.0 5572000.0
+expect    -61.0000574 -39.9996182
+
+tolerance  0.03 m
+accept    5500000.0 5572399.996
+expect    -60 -40.0003306
+
+tolerance  0.03 m
+accept    5585400.0 5572000.0
+expect    -58.9999426 -39.9996182
+
+tolerance  0.03 m
+accept    5670800.005 5570500.009
+expect    -57.9999222 -40.0001803
+
+tolerance  0.03 m
+accept    5756200.0 5568100.0
+expect    -57.0000158 -40.0002087
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4190 +inv
+           +step +init=epsg:22175
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -63.9993433 80.0002644
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9998472 60.0001191
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997361 40.0003081
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.0004605 19.9996448
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9996186 0.0003092
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.0004675 -19.9999283
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997001 -39.9996924
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9998814 -60.0004008
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9991006 -79.9996521
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -70.0002089 -40.000215
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -69.0001441 -40.0002935
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -67.9995333 -39.9996136
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -66.9998073 -39.9999313
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -65.9996522 -39.9995894
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -64.9992796 -40.000411
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -63.9997 -39.9996925
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -62.9999842 -40.0002087
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -62.0000778 -40.0001803
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -61.0000574 -39.9996182
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -60 -40.0003306
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -58.9999426 -39.9996182
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -57.9999222 -40.0001803
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -57.0000158 -40.0002087
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5102.1.gie b/test/gigs/5102.1.gie
new file mode 100644
index 00000000..d3eef080
--- /dev/null
+++ b/test/gigs/5102.1.gie
@@ -0,0 +1,252 @@
+--------------------------------------------------------------------------------
+
+Test 5102, Lambert Conic Conformal (1SP), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4230 +inv
+           +step +init=epsg:2192
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    5 58
+expect    760722.92 3457368.68
+
+tolerance  0.03 m
+accept    5 57
+expect    764566.844 3343948.93
+
+tolerance  0.03 m
+accept    5 56
+expect    768396.683 3230944.812
+
+tolerance  0.03 m
+accept    5 55
+expect    772213.973 3118310.947
+
+tolerance  0.03 m
+accept    5 54
+expect    776020.189 3006003.839
+
+tolerance  0.03 m
+accept    5 53
+expect    779816.748 2893981.68
+
+tolerance  0.03 m
+accept    4 51
+expect    717027.292 2668695.784
+
+tolerance  0.03 m
+accept    4 50
+expect    719385.249 2557252.841
+
+tolerance  0.03 m
+accept    4 49
+expect    721740.43 2445941.161
+
+tolerance  0.03 m
+accept    4 46.8
+expect    726915.752 2201342.519
+
+tolerance  0.03 m
+accept    3 53
+expect    644764.905 2891124.195
+
+tolerance  0.03 m
+accept    4 53
+expect    712299.916 2892123.369
+
+tolerance  0.03 m
+accept    5 53
+expect    779816.748 2893981.68
+
+tolerance  0.03 m
+accept    6 53
+expect    847304.473 2896698.827
+
+tolerance  0.03 m
+accept    7 53
+expect    914752.168 2900274.371
+
+tolerance  0.03 m
+accept    8 53
+expect    982148.913 2904707.734
+
+tolerance  0.03 m
+accept    9 53
+expect    1049483.8 2909998.196
+
+tolerance  0.03 m
+accept    10 53
+expect    1116745.929 2916144.902
+
+tolerance  0.03 m
+accept    11 53
+expect    1183924.412 2923146.858
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:2192 +inv
+           +step +init=epsg:4230
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    760722.92 3457368.68
+expect    5 58
+
+tolerance  0.03 m
+accept    764566.844 3343948.93
+expect    5 57
+
+tolerance  0.03 m
+accept    768396.683 3230944.812
+expect    5 56
+
+tolerance  0.03 m
+accept    772213.973 3118310.947
+expect    5 55
+
+tolerance  0.03 m
+accept    776020.189 3006003.839
+expect    5 54
+
+tolerance  0.03 m
+accept    779816.748 2893981.68
+expect    5 53
+
+tolerance  0.03 m
+accept    717027.292 2668695.784
+expect    4 51
+
+tolerance  0.03 m
+accept    719385.249 2557252.841
+expect    4 50
+
+tolerance  0.03 m
+accept    721740.43 2445941.161
+expect    4 49
+
+tolerance  0.03 m
+accept    726915.752 2201342.519
+expect    4 46.8
+
+tolerance  0.03 m
+accept    644764.905 2891124.195
+expect    3 53
+
+tolerance  0.03 m
+accept    712299.916 2892123.369
+expect    4 53
+
+tolerance  0.03 m
+accept    779816.748 2893981.68
+expect    5 53
+
+tolerance  0.03 m
+accept    847304.473 2896698.827
+expect    6 53
+
+tolerance  0.03 m
+accept    914752.168 2900274.371
+expect    7 53
+
+tolerance  0.03 m
+accept    982148.913 2904707.734
+expect    8 53
+
+tolerance  0.03 m
+accept    1049483.8 2909998.196
+expect    9 53
+
+tolerance  0.03 m
+accept    1116745.929 2916144.902
+expect    10 53
+
+tolerance  0.03 m
+accept    1183924.412 2923146.858
+expect    11 53
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4230 +inv
+           +step +init=epsg:2192
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    5 58
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 57
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 56
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 55
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 54
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 51
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 50
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 46.8
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    9 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    10 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    11 53
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5102.2.gie b/test/gigs/5102.2.gie
new file mode 100644
index 00000000..db812dbd
--- /dev/null
+++ b/test/gigs/5102.2.gie
@@ -0,0 +1,252 @@
+--------------------------------------------------------------------------------
+
+Test 5102 (part 2), Lambert Conic Conformal (1SP), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4807 +inv
+           +step +init=epsg:27572
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    2.9586342556 64.4444444444
+expect    760724.023 3457334.864
+
+tolerance  0.03 m
+accept    2.9586342556 63.3333333333
+expect    764567.882 3343917.044
+
+tolerance  0.03 m
+accept    2.9586342556 62.2222222222
+expect    768397.648 3230915.06
+
+tolerance  0.03 m
+accept    2.9586342556 61.1111111111
+expect    772214.859 3118283.535
+
+tolerance  0.03 m
+accept    2.9586342556 60
+expect    776020.989 3005978.979
+
+tolerance  0.03 m
+accept    2.9586342556 58.8888888889
+expect    779817.454 2893959.584
+
+tolerance  0.03 m
+accept    1.8475231444 56.6666666667
+expect    717027.602 2668679.866
+
+tolerance  0.03 m
+accept    1.8475231444 55.5555555556
+expect    719385.487 2557240.347
+
+tolerance  0.03 m
+accept    1.8475231444 54.4444444444
+expect    721740.59 2445932.319
+
+tolerance  0.03 m
+accept    1.8475231444 52
+expect    726915.726 2201342.51839
+
+tolerance  0.03 m
+accept    0.7364120333 58.8888888889
+expect    644765.081 2891102.088
+
+tolerance  0.03 m
+accept    1.8475231444 58.8888888889
+expect    712300.356 2892101.266
+
+tolerance  0.03 m
+accept    2.9586342556 58.8888888889
+expect    779817.454 2893959.584
+
+tolerance  0.03 m
+accept    4.0697453667 58.8888888889
+expect    847305.444 2896676.742
+
+tolerance  0.03 m
+accept    5.1808564778 58.8888888889
+expect    914753.403 2900252.301
+
+tolerance  0.03 m
+accept    6.2919675889 58.8888888889
+expect    982150.413 2904685.68
+
+tolerance  0.03 m
+accept    7.4030787 58.8888888889
+expect    1049485.565 2909976.163
+
+tolerance  0.03 m
+accept    8.5141898111 58.8888888889
+expect    1116747.958 2916122.894
+
+tolerance  0.03 m
+accept    9.6253009222 58.8888888889
+expect    1183926.705 2923124.876
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:27572 +inv
+           +step +init=epsg:4807
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    760724.023 3457334.864
+expect    2.9586342556 64.4444444444
+
+tolerance  0.03 m
+accept    764567.882 3343917.044
+expect    2.9586342556 63.3333333333
+
+tolerance  0.03 m
+accept    768397.648 3230915.06
+expect    2.9586342556 62.2222222222
+
+tolerance  0.03 m
+accept    772214.859 3118283.535
+expect    2.9586342556 61.1111111111
+
+tolerance  0.03 m
+accept    776020.989 3005978.979
+expect    2.9586342556 60
+
+tolerance  0.03 m
+accept    779817.454 2893959.584
+expect    2.9586342556 58.8888888889
+
+tolerance  0.03 m
+accept    717027.602 2668679.866
+expect    1.8475231444 56.6666666667
+
+tolerance  0.03 m
+accept    719385.487 2557240.347
+expect    1.8475231444 55.5555555556
+
+tolerance  0.03 m
+accept    721740.59 2445932.319
+expect    1.8475231444 54.4444444444
+
+tolerance  0.03 m
+accept    726915.726 2201342.51839
+expect    1.8475231444 52
+
+tolerance  0.03 m
+accept    644765.081 2891102.088
+expect    0.7364120333 58.8888888889
+
+tolerance  0.03 m
+accept    712300.356 2892101.266
+expect    1.8475231444 58.8888888889
+
+tolerance  0.03 m
+accept    779817.454 2893959.584
+expect    2.9586342556 58.8888888889
+
+tolerance  0.03 m
+accept    847305.444 2896676.742
+expect    4.0697453667 58.8888888889
+
+tolerance  0.03 m
+accept    914753.403 2900252.301
+expect    5.1808564778 58.8888888889
+
+tolerance  0.03 m
+accept    982150.413 2904685.68
+expect    6.2919675889 58.8888888889
+
+tolerance  0.03 m
+accept    1049485.565 2909976.163
+expect    7.4030787 58.8888888889
+
+tolerance  0.03 m
+accept    1116747.958 2916122.894
+expect    8.5141898111 58.8888888889
+
+tolerance  0.03 m
+accept    1183926.705 2923124.876
+expect    9.6253009222 58.8888888889
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4807 +inv
+           +step +init=epsg:27572
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    2.9586342556 64.4444444444
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 63.3333333333
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 62.2222222222
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 61.1111111111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.8475231444 56.6666666667
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.8475231444 55.5555555556
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.8475231444 54.4444444444
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.8475231444 52
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0.7364120333 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    1.8475231444 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    2.9586342556 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4.0697453667 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.1808564778 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6.2919675889 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7.4030787 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8.5141898111 58.8888888889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    9.6253009222 58.8888888889
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5103.1.gie b/test/gigs/5103.1.gie
new file mode 100644
index 00000000..f00ed019
--- /dev/null
+++ b/test/gigs/5103.1.gie
@@ -0,0 +1,264 @@
+--------------------------------------------------------------------------------
+
+Test 5103 (part 1), Lambert Conic Conformal (2SP), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4313 +inv
+           +step +init=epsg:31370
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    5 58
+expect    187742.7 969521.653
+
+tolerance  0.03 m
+accept    5 57
+expect    188698.877 857277.135
+
+tolerance  0.03 m
+accept    5 56
+expect    189652.853 745291.184
+
+tolerance  0.03 m
+accept    5 55
+expect    190604.967 633523.672
+
+tolerance  0.03 m
+accept    5 54
+expect    191555.55 521935.9
+
+tolerance  0.03 m
+accept    5 53
+expect    192504.921 410490.433
+
+tolerance  0.03 m
+accept    5.3876389 52.1561606
+expect    219843.841 316827.604
+
+tolerance  0.03 m
+accept    4 51
+expect    124202.936 187756.876
+
+tolerance  0.03 m
+accept    4 50
+expect    123652.406 76521.628
+
+tolerance  0.03 m
+accept    4 49
+expect    123101.889 -34711.068
+
+tolerance  0.03 m
+accept    3.3137281 47.9752611
+expect    71254.553 -148236.592
+
+tolerance  0.03 m
+accept    3 53
+expect    58108.966 411155.591
+
+tolerance  0.03 m
+accept    4 53
+expect    125304.704 410370.504
+
+tolerance  0.03 m
+accept    5 53
+expect    192504.921 410490.433
+
+tolerance  0.03 m
+accept    6 53
+expect    259697.429 411515.356
+
+tolerance  0.03 m
+accept    7 53
+expect    326870.04 413445.087
+
+tolerance  0.03 m
+accept    8 53
+expect    394010.571 416279.276
+
+tolerance  0.03 m
+accept    9 53
+expect    461106.844 420017.408
+
+tolerance  0.03 m
+accept    10 53
+expect    528146.69 424658.807
+
+tolerance  0.03 m
+accept    11 53
+expect    595117.95 430202.63
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:31370 +inv
+           +step +init=epsg:4313
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    187742.7 969521.653
+expect    5 58
+
+tolerance  0.03 m
+accept    188698.877 857277.135
+expect    5 57
+
+tolerance  0.03 m
+accept    189652.853 745291.184
+expect    5 56
+
+tolerance  0.03 m
+accept    190604.967 633523.672
+expect    5 55
+
+tolerance  0.03 m
+accept    191555.55 521935.9
+expect    5 54
+
+tolerance  0.03 m
+accept    192504.921 410490.433
+expect    5 53
+
+tolerance  0.03 m
+accept    219843.841 316827.604
+expect    5.3876389 52.1561606
+
+tolerance  0.03 m
+accept    124202.936 187756.876
+expect    4 51
+
+tolerance  0.03 m
+accept    123652.406 76521.628
+expect    4 50
+
+tolerance  0.03 m
+accept    123101.889 -34711.068
+expect    4 49
+
+tolerance  0.03 m
+accept    71254.553 -148236.592
+expect    3.3137281 47.9752611
+
+tolerance  0.03 m
+accept    58108.966 411155.591
+expect    3 53
+
+tolerance  0.03 m
+accept    125304.704 410370.504
+expect    4 53
+
+tolerance  0.03 m
+accept    192504.921 410490.433
+expect    5 53
+
+tolerance  0.03 m
+accept    259697.429 411515.356
+expect    6 53
+
+tolerance  0.03 m
+accept    326870.04 413445.087
+expect    7 53
+
+tolerance  0.03 m
+accept    394010.571 416279.276
+expect    8 53
+
+tolerance  0.03 m
+accept    461106.844 420017.408
+expect    9 53
+
+tolerance  0.03 m
+accept    528146.69 424658.807
+expect    10 53
+
+tolerance  0.03 m
+accept    595117.95 430202.63
+expect    11 53
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4313 +inv
+           +step +init=epsg:31370
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    5 58
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 57
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 56
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 55
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 54
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.3876389 52.1561606
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 51
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 50
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.3137281 47.9752611
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    9 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    10 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    11 53
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5103.2.gie b/test/gigs/5103.2.gie
new file mode 100644
index 00000000..3975e9d8
--- /dev/null
+++ b/test/gigs/5103.2.gie
@@ -0,0 +1,144 @@
+--------------------------------------------------------------------------------
+
+Test 5103 (part 2), Lambert Conic Conformal (2SP), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4152 +inv
+           +step +init=epsg:2921
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -110 49
+expect    2003937.27 6452491.7
+
+tolerance  0.03 m
+accept    -110 47
+expect    2016621.93 5717728.61
+
+tolerance  0.03 m
+accept    -110 45
+expect    2029255.57 4985920.56
+
+tolerance  0.03 m
+accept    -110 43
+expect    2041855.08 4256089.74
+
+tolerance  0.03 m
+accept    -110 41
+expect    2054436.57 3527302.73
+
+tolerance  0.03 m
+accept    -110 41
+expect    2054436.57 3527302.73
+
+tolerance  0.03 m
+accept    -108 41
+expect    2606245.52 3543182.55
+
+tolerance  0.03 m
+accept    -106 41
+expect    3157542.86 3571757.39
+
+tolerance  0.03 m
+accept    -104 41
+expect    3708036.57 3613012.12
+
+tolerance  0.03 m
+accept    -102 41
+expect    4257435.06 3666924.89
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:2921 +inv
+           +step +init=epsg:4152
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    2003937.27 6452491.7
+expect    -110 49
+
+tolerance  0.03 m
+accept    2016621.93 5717728.61
+expect    -110 47
+
+tolerance  0.03 m
+accept    2029255.57 4985920.56
+expect    -110 45
+
+tolerance  0.03 m
+accept    2041855.08 4256089.74
+expect    -110 43
+
+tolerance  0.03 m
+accept    2054436.57 3527302.73
+expect    -110 41
+
+tolerance  0.03 m
+accept    2054436.57 3527302.73
+expect    -110 41
+
+tolerance  0.03 m
+accept    2606245.52 3543182.55
+expect    -108 41
+
+tolerance  0.03 m
+accept    3157542.86 3571757.39
+expect    -106 41
+
+tolerance  0.03 m
+accept    3708036.57 3613012.12
+expect    -104 41
+
+tolerance  0.03 m
+accept    4257435.06 3666924.89
+expect    -102 41
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4152 +inv
+           +step +init=epsg:2921
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -110 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 47
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 45
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 43
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -108 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -106 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -104 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -102 41
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5103.3.gie b/test/gigs/5103.3.gie
new file mode 100644
index 00000000..b8965132
--- /dev/null
+++ b/test/gigs/5103.3.gie
@@ -0,0 +1,144 @@
+--------------------------------------------------------------------------------
+
+Test 5103 (part 3), Lambert Conic Conformal (2SP), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4152 +inv
+           +step +init=epsg:3568
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -110 49
+expect    2003933.27 6452478.8
+
+tolerance  0.03 m
+accept    -110 47
+expect    2016617.9 5717717.18
+
+tolerance  0.03 m
+accept    -110 45
+expect    2029251.51 4985910.59
+
+tolerance  0.03 m
+accept    -110 43
+expect    2041851.0 4256081.23
+
+tolerance  0.03 m
+accept    -110 41
+expect    2054432.46 3527295.67
+
+tolerance  0.03 m
+accept    -110 41
+expect    2054432.46 3527295.67
+
+tolerance  0.03 m
+accept    -108 41
+expect    2606240.3 3543175.46
+
+tolerance  0.03 m
+accept    -106 41
+expect    3157536.54 3571750.25
+
+tolerance  0.03 m
+accept    -104 41
+expect    3708029.16 3613004.9
+
+tolerance  0.03 m
+accept    -102 41
+expect    4257426.54 3666917.56
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3568 +inv
+           +step +init=epsg:4152
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    2003933.27 6452478.8
+expect    -110 49
+
+tolerance  0.03 m
+accept    2016617.9 5717717.18
+expect    -110 47
+
+tolerance  0.03 m
+accept    2029251.51 4985910.59
+expect    -110 45
+
+tolerance  0.03 m
+accept    2041851.0 4256081.23
+expect    -110 43
+
+tolerance  0.03 m
+accept    2054432.46 3527295.67
+expect    -110 41
+
+tolerance  0.03 m
+accept    2054432.46 3527295.67
+expect    -110 41
+
+tolerance  0.03 m
+accept    2606240.3 3543175.46
+expect    -108 41
+
+tolerance  0.03 m
+accept    3157536.54 3571750.25
+expect    -106 41
+
+tolerance  0.03 m
+accept    3708029.16 3613004.9
+expect    -104 41
+
+tolerance  0.03 m
+accept    4257426.54 3666917.56
+expect    -102 41
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4152 +inv
+           +step +init=epsg:3568
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -110 49
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 47
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 45
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 43
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -110 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -108 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -106 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -104 41
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -102 41
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5104.gie b/test/gigs/5104.gie
new file mode 100644
index 00000000..10c42935
--- /dev/null
+++ b/test/gigs/5104.gie
@@ -0,0 +1,264 @@
+--------------------------------------------------------------------------------
+
+Test 5104, Oblique stereographic, v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4289 +inv
+           +step +init=epsg:28992
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    5 58
+expect    132023.27 1114054.87
+
+tolerance  0.05 m
+accept    5 57
+expect    131405.466 1002468.081
+
+tolerance  0.05 m
+accept    5 56
+expect    130792.264 890981.281
+
+tolerance  0.05 m
+accept    5 55
+expect    130183.56 779577.7
+
+tolerance  0.05 m
+accept    5 54
+expect    129579.26 668240.58
+
+tolerance  0.05 m
+accept    5 53
+expect    128979.26 556953.19
+
+tolerance  0.05 m
+accept    5.38763888889 52.1561605556
+expect    155000 463000
+
+tolerance  0.05 m
+accept    4 51
+expect    57605.946 335312.662
+
+tolerance  0.05 m
+accept    4 50
+expect    55502.306 224086.514
+
+tolerance  0.05 m
+accept    4.0 49.0
+expect    53412.76 112842.73
+
+tolerance  0.05 m
+accept    3.31372805556 47.9752611111
+expect    0 0
+
+tolerance  0.05 m
+accept    3 53
+expect    -5253.06 559535.55
+
+tolerance  0.05 m
+accept    4 53
+expect    61856.78 557779.12
+
+tolerance  0.05 m
+accept    5 53
+expect    128979.26 556953.19
+
+tolerance  0.05 m
+accept    6 53
+expect    196105.28 557057.74
+
+tolerance  0.05 m
+accept    7 53
+expect    263225.72 558092.77
+
+tolerance  0.05 m
+accept    8 53
+expect    330331.46 560058.31
+
+tolerance  0.05 m
+accept    9 53
+expect    397413.385 562954.436
+
+tolerance  0.05 m
+accept    10 53
+expect    464462.35 566781.24
+
+tolerance  0.05 m
+accept    11 53
+expect    531469.2 571538.84
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:28992 +inv
+           +step +init=epsg:4289
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    132023.27 1114054.87
+expect    5 58
+
+tolerance  0.05 m
+accept    131405.466 1002468.081
+expect    5 57
+
+tolerance  0.05 m
+accept    130792.264 890981.281
+expect    5 56
+
+tolerance  0.05 m
+accept    130183.56 779577.7
+expect    5 55
+
+tolerance  0.05 m
+accept    129579.26 668240.58
+expect    5 54
+
+tolerance  0.05 m
+accept    128979.26 556953.19
+expect    5 53
+
+tolerance  0.05 m
+accept    155000 463000
+expect    5.38763888889 52.1561605556
+
+tolerance  0.05 m
+accept    57605.946 335312.662
+expect    4 51
+
+tolerance  0.05 m
+accept    55502.306 224086.514
+expect    4 50
+
+tolerance  0.05 m
+accept    53412.76 112842.73
+expect    4.0 49.0
+
+tolerance  0.05 m
+accept    0 0
+expect    3.31372805556 47.9752611111
+
+tolerance  0.05 m
+accept    -5253.06 559535.55
+expect    3 53
+
+tolerance  0.05 m
+accept    61856.78 557779.12
+expect    4 53
+
+tolerance  0.05 m
+accept    128979.26 556953.19
+expect    5 53
+
+tolerance  0.05 m
+accept    196105.28 557057.74
+expect    6 53
+
+tolerance  0.05 m
+accept    263225.72 558092.77
+expect    7 53
+
+tolerance  0.05 m
+accept    330331.46 560058.31
+expect    8 53
+
+tolerance  0.05 m
+accept    397413.385 562954.436
+expect    9 53
+
+tolerance  0.05 m
+accept    464462.35 566781.24
+expect    10 53
+
+tolerance  0.05 m
+accept    531469.2 571538.84
+expect    11 53
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4289 +inv
+           +step +init=epsg:28992
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    5 58
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 57
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 56
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 55
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 54
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.38763888889 52.1561605556
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 51
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 50
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4.0 49.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.31372805556 47.9752611111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    4 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    6 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    7 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    9 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    10 53
+roundtrip 1000
+
+tolerance  0.006 m
+accept    11 53
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5105.1.gie b/test/gigs/5105.1.gie
new file mode 100644
index 00000000..a0803d2b
--- /dev/null
+++ b/test/gigs/5105.1.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5105 (part 1), Oblique Mercator (variant B), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +proj=somerc +lat_0=4 +lonc=115 +alpha=53.31580995 +k=0.99984 +x_0=0 +y_0=0 +no_uoff +gamma=53.13010236111111 +ellps=GRS80 +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    117 12
+expect    807919.14 1329535.33
+
+tolerance  0.05 m
+accept    117 10
+expect    808784.98 1107678.47
+
+tolerance  0.05 m
+accept    117 9
+expect    809334.18 996918.21
+
+tolerance  0.05 m
+accept    117 8
+expect    809939.3 886240.18
+
+tolerance  0.05 m
+accept    116.8465522 6.8784583
+expect    793704.63 762081.05
+
+tolerance  0.05 m
+accept    117 6
+expect    811253.3 665041.27
+
+tolerance  0.05 m
+accept    117 5
+expect    811930.35 554475.63
+
+tolerance  0.05 m
+accept    117 4
+expect    812599.58 443902.71
+
+tolerance  0.05 m
+accept    115 4
+expect    590521.15 442890.86
+
+tolerance  0.05 m
+accept    117 3
+expect    813245.13 333300.13
+
+tolerance  0.05 m
+accept    117 2
+expect    813851.07 222645.51
+
+tolerance  0.05 m
+accept    117.0 1.0
+expect    814401.38 111916.45
+
+tolerance  0.05 m
+accept    109.6858208 -0.0001733
+expect    0 0
+
+tolerance  0.05 m
+accept    123 6
+expect    1475669.28 673118.57
+
+tolerance  0.05 m
+accept    122 6
+expect    1364854.86 671146.25
+
+tolerance  0.05 m
+accept    121 6
+expect    1254086.17 669446.25
+
+tolerance  0.05 m
+accept    120.0 6.0
+expect    1143352.6 668002.07
+
+tolerance  0.05 m
+accept    119.0 6.0
+expect    1032643.31 666797.35
+
+tolerance  0.05 m
+accept    118.0 6.0
+expect    921947.29 665815.82
+
+tolerance  0.05 m
+accept    117.0 6.0
+expect    811253.3 665041.27
+
+tolerance  0.05 m
+accept    116.0 6.0
+expect    700549.97 664457.59
+
+tolerance  0.05 m
+accept    115.0 6.0
+expect    589825.71 664048.72
+
+tolerance  0.05 m
+accept    114 6
+expect    479068.802 663798.63
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +proj=somerc +lat_0=4 +lonc=115 +alpha=53.31580995 +k=0.99984 +x_0=0 +y_0=0 +no_uoff +gamma=53.13010236111111 +ellps=GRS80 +units=m +no_defs +inv
+           +step +init=epsg:4742
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    807919.14 1329535.33
+expect    117 12
+
+tolerance  0.05 m
+accept    808784.98 1107678.47
+expect    117 10
+
+tolerance  0.05 m
+accept    809334.18 996918.21
+expect    117 9
+
+tolerance  0.05 m
+accept    809939.3 886240.18
+expect    117 8
+
+tolerance  0.05 m
+accept    793704.63 762081.05
+expect    116.8465522 6.8784583
+
+tolerance  0.05 m
+accept    811253.3 665041.27
+expect    117 6
+
+tolerance  0.05 m
+accept    811930.35 554475.63
+expect    117 5
+
+tolerance  0.05 m
+accept    812599.58 443902.71
+expect    117 4
+
+tolerance  0.05 m
+accept    590521.15 442890.86
+expect    115 4
+
+tolerance  0.05 m
+accept    813245.13 333300.13
+expect    117 3
+
+tolerance  0.05 m
+accept    813851.07 222645.51
+expect    117 2
+
+tolerance  0.05 m
+accept    814401.38 111916.45
+expect    117.0 1.0
+
+tolerance  0.05 m
+accept    0 0
+expect    109.6858208 -0.0001733
+
+tolerance  0.05 m
+accept    1475669.28 673118.57
+expect    123 6
+
+tolerance  0.05 m
+accept    1364854.86 671146.25
+expect    122 6
+
+tolerance  0.05 m
+accept    1254086.17 669446.25
+expect    121 6
+
+tolerance  0.05 m
+accept    1143352.6 668002.07
+expect    120.0 6.0
+
+tolerance  0.05 m
+accept    1032643.31 666797.35
+expect    119.0 6.0
+
+tolerance  0.05 m
+accept    921947.29 665815.82
+expect    118.0 6.0
+
+tolerance  0.05 m
+accept    811253.3 665041.27
+expect    117.0 6.0
+
+tolerance  0.05 m
+accept    700549.97 664457.59
+expect    116.0 6.0
+
+tolerance  0.05 m
+accept    589825.71 664048.72
+expect    115.0 6.0
+
+tolerance  0.05 m
+accept    479068.802 663798.63
+expect    114 6
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +proj=somerc +lat_0=4 +lonc=115 +alpha=53.31580995 +k=0.99984 +x_0=0 +y_0=0 +no_uoff +gamma=53.13010236111111 +ellps=GRS80 +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    117 12
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 10
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 9
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 8
+roundtrip 1000
+
+tolerance  0.006 m
+accept    116.8465522 6.8784583
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 4
+roundtrip 1000
+
+tolerance  0.006 m
+accept    115 4
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 3
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 2
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117.0 1.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    109.6858208 -0.0001733
+roundtrip 1000
+
+tolerance  0.006 m
+accept    123 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    122 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    121 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    120.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    119.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    118.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    116.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    115.0 6.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    114 6
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5105.2.gie b/test/gigs/5105.2.gie
new file mode 100644
index 00000000..190c9176
--- /dev/null
+++ b/test/gigs/5105.2.gie
@@ -0,0 +1,168 @@
+--------------------------------------------------------------------------------
+
+Test 5105 (part 2), Oblique Mercator (variant B), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4237 +inv
+           +step +init=epsg:23700
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    16 48.5
+expect    424714.235 355124.6
+
+tolerance  0.05 m
+accept    17.2 48.0
+expect    512056.188 296756.716
+
+tolerance  0.05 m
+accept    17.5826505556 47.6361347222
+expect    539847.765 255701.086
+
+tolerance  0.05 m
+accept    19.0485716667 47.1443936111
+expect    650000 200000
+
+tolerance  0.05 m
+accept    19.2234294444 46.8756683333
+expect    663329.053 170142.318
+
+tolerance  0.05 m
+accept    20.1357405556 46.3703011111
+expect    733651.455 114532.099
+
+tolerance  0.05 m
+accept    21.4 45.7
+expect    833148.855 42191.482
+
+tolerance  0.05 m
+accept    22.3 49.3
+expect    886565.935 444656.613
+
+tolerance  0.05 m
+accept    21.2941986111 48.4899747222
+expect    815999.993 351999.998
+
+tolerance  0.05 m
+accept    19.2234294444 46.8756683333
+expect    663329.053 170142.318
+
+tolerance  0.05 m
+accept    17.6191536111 46.0687463889
+expect    539403.958 81440.103
+
+tolerance  0.05 m
+accept    16.36 45.5
+expect    439836.709 20816.456
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:23700 +inv
+           +step +init=epsg:4237
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    424714.235 355124.6
+expect    16 48.5
+
+tolerance  0.05 m
+accept    512056.188 296756.716
+expect    17.2 48.0
+
+tolerance  0.05 m
+accept    539847.765 255701.086
+expect    17.5826505556 47.6361347222
+
+tolerance  0.05 m
+accept    650000 200000
+expect    19.0485716667 47.1443936111
+
+tolerance  0.05 m
+accept    663329.053 170142.318
+expect    19.2234294444 46.8756683333
+
+tolerance  0.05 m
+accept    733651.455 114532.099
+expect    20.1357405556 46.3703011111
+
+tolerance  0.05 m
+accept    833148.855 42191.482
+expect    21.4 45.7
+
+tolerance  0.05 m
+accept    886565.935 444656.613
+expect    22.3 49.3
+
+tolerance  0.05 m
+accept    815999.993 351999.998
+expect    21.2941986111 48.4899747222
+
+tolerance  0.05 m
+accept    663329.053 170142.318
+expect    19.2234294444 46.8756683333
+
+tolerance  0.05 m
+accept    539403.958 81440.103
+expect    17.6191536111 46.0687463889
+
+tolerance  0.05 m
+accept    439836.709 20816.456
+expect    16.36 45.5
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4237 +inv
+           +step +init=epsg:23700
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    16 48.5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    17.2 48.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    17.5826505556 47.6361347222
+roundtrip 1000
+
+tolerance  0.006 m
+accept    19.0485716667 47.1443936111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    19.2234294444 46.8756683333
+roundtrip 1000
+
+tolerance  0.006 m
+accept    20.1357405556 46.3703011111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    21.4 45.7
+roundtrip 1000
+
+tolerance  0.006 m
+accept    22.3 49.3
+roundtrip 1000
+
+tolerance  0.006 m
+accept    21.2941986111 48.4899747222
+roundtrip 1000
+
+tolerance  0.006 m
+accept    19.2234294444 46.8756683333
+roundtrip 1000
+
+tolerance  0.006 m
+accept    17.6191536111 46.0687463889
+roundtrip 1000
+
+tolerance  0.006 m
+accept    16.36 45.5
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5106.gie b/test/gigs/5106.gie
new file mode 100644
index 00000000..6c5940ef
--- /dev/null
+++ b/test/gigs/5106.gie
@@ -0,0 +1,300 @@
+--------------------------------------------------------------------------------
+
+Test 5106, Hotine Oblique Mercator (variant A), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +init=epsg:3376
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    117 12
+expect    807919.144 1329535.334
+
+tolerance  0.05 m
+accept    117 10
+expect    808784.981 1107678.473
+
+tolerance  0.05 m
+accept    117 9
+expect    809334.177 996918.212
+
+tolerance  0.05 m
+accept    117 8
+expect    809939.302 886240.183
+
+tolerance  0.05 m
+accept    116.846552222 6.87845833333
+expect    793704.631 762081.047
+
+tolerance  0.05 m
+accept    117 6
+expect    811253.303 665041.265
+
+tolerance  0.05 m
+accept    117 5
+expect    811930.345 554475.627
+
+tolerance  0.05 m
+accept    117 4
+expect    812599.582 443902.706
+
+tolerance  0.05 m
+accept    115 4
+expect    590521.147 442890.861
+
+tolerance  0.05 m
+accept    117 3
+expect    813245.133 333300.13
+
+tolerance  0.05 m
+accept    117 2
+expect    813851.067 222645.511
+
+tolerance  0.05 m
+accept    117 1
+expect    814401.375 111916.452
+
+tolerance  0.05 m
+accept    109.685820833 -0.000173333333333
+expect    0 0
+
+tolerance  0.05 m
+accept    123 6
+expect    1475669.281 673118.573
+
+tolerance  0.05 m
+accept    122 6
+expect    1364854.862 671146.254
+
+tolerance  0.05 m
+accept    121 6
+expect    1254086.173 669446.249
+
+tolerance  0.05 m
+accept    120 6
+expect    1143352.598 668002.074
+
+tolerance  0.05 m
+accept    119 6
+expect    1032643.312 666797.354
+
+tolerance  0.05 m
+accept    118 6
+expect    921947.286 665815.815
+
+tolerance  0.05 m
+accept    117 6
+expect    811253.303 665041.265
+
+tolerance  0.05 m
+accept    116 6
+expect    700549.965 664457.586
+
+tolerance  0.05 m
+accept    115 6
+expect    589825.706 664048.715
+
+tolerance  0.05 m
+accept    114 6
+expect    479068.802 663798.63
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3376 +inv
+           +step +init=epsg:4742
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    807919.144 1329535.334
+expect    117 12
+
+tolerance  0.05 m
+accept    808784.981 1107678.473
+expect    117 10
+
+tolerance  0.05 m
+accept    809334.177 996918.212
+expect    117 9
+
+tolerance  0.05 m
+accept    809939.302 886240.183
+expect    117 8
+
+tolerance  0.05 m
+accept    793704.631 762081.047
+expect    116.846552222 6.87845833333
+
+tolerance  0.05 m
+accept    811253.303 665041.265
+expect    117 6
+
+tolerance  0.05 m
+accept    811930.345 554475.627
+expect    117 5
+
+tolerance  0.05 m
+accept    812599.582 443902.706
+expect    117 4
+
+tolerance  0.05 m
+accept    590521.147 442890.861
+expect    115 4
+
+tolerance  0.05 m
+accept    813245.133 333300.13
+expect    117 3
+
+tolerance  0.05 m
+accept    813851.067 222645.511
+expect    117 2
+
+tolerance  0.05 m
+accept    814401.375 111916.452
+expect    117 1
+
+tolerance  0.05 m
+accept    0 0
+expect    109.685820833 -0.000173333333333
+
+tolerance  0.05 m
+accept    1475669.281 673118.573
+expect    123 6
+
+tolerance  0.05 m
+accept    1364854.862 671146.254
+expect    122 6
+
+tolerance  0.05 m
+accept    1254086.173 669446.249
+expect    121 6
+
+tolerance  0.05 m
+accept    1143352.598 668002.074
+expect    120 6
+
+tolerance  0.05 m
+accept    1032643.312 666797.354
+expect    119 6
+
+tolerance  0.05 m
+accept    921947.286 665815.815
+expect    118 6
+
+tolerance  0.05 m
+accept    811253.303 665041.265
+expect    117 6
+
+tolerance  0.05 m
+accept    700549.965 664457.586
+expect    116 6
+
+tolerance  0.05 m
+accept    589825.706 664048.715
+expect    115 6
+
+tolerance  0.05 m
+accept    479068.802 663798.63
+expect    114 6
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +init=epsg:3376
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    117 12
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 10
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 9
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 8
+roundtrip 1000
+
+tolerance  0.006 m
+accept    116.846552222 6.87845833333
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 4
+roundtrip 1000
+
+tolerance  0.006 m
+accept    115 4
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 3
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 2
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 1
+roundtrip 1000
+
+tolerance  0.006 m
+accept    109.685820833 -0.000173333333333
+roundtrip 1000
+
+tolerance  0.006 m
+accept    123 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    122 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    121 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    120 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    119 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    118 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    117 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    116 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    115 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    114 6
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5107.gie b/test/gigs/5107.gie
new file mode 100644
index 00000000..f78e9c22
--- /dev/null
+++ b/test/gigs/5107.gie
@@ -0,0 +1,180 @@
+--------------------------------------------------------------------------------
+
+Test 5107, American Polyconic, v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4674 +inv
+           +step +proj=poly +lat_0=0 +lon_0=-54 +x_0=5000000 +y_0=10000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    -54 0
+expect    5000000.0 10000000.0
+
+tolerance  0.05 m
+accept    -45 6
+expect    5996378.70982 10671650.0559
+
+tolerance  0.05 m
+accept    -45 0
+expect    6001875.41714 10000000.0
+
+tolerance  0.05 m
+accept    -45 -6
+expect    5996378.70982 9328349.94408
+
+tolerance  0.05 m
+accept    -41 -13
+expect    6409689.58688 8526306.26193
+
+tolerance  0.05 m
+accept    -38 -20
+expect    6671808.91963 7707735.72988
+
+tolerance  0.05 m
+accept    -37 -24
+expect    6725584.49173 7240461.99578
+
+tolerance  0.05 m
+accept    -36 -30
+expect    6729619.73995 6543762.57644
+
+tolerance  0.05 m
+accept    -57 -30
+expect    4710574.22344 6676097.81117
+
+tolerance  0.05 m
+accept    -54 -29.3674766667
+expect    5000000.0 6750000.0
+
+tolerance  0.05 m
+accept    -47 -27.5
+expect    5691318.14689 6937461.05067
+
+tolerance  0.05 m
+accept    -37 -24
+expect    6725584.49173 7240461.99578
+
+tolerance  0.05 m
+accept    -30 -22.5
+expect    7458947.70133 7313327.31691
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +proj=poly +lat_0=0 +lon_0=-54 +x_0=5000000 +y_0=10000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs  +inv
+           +step +init=epsg:4674
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    5000000.0 10000000.0
+expect    -54 0
+
+tolerance  0.05 m
+accept    5996378.70982 10671650.0559
+expect    -45 6
+
+tolerance  0.05 m
+accept    6001875.41714 10000000.0
+expect    -45 0
+
+tolerance  0.05 m
+accept    5996378.70982 9328349.94408
+expect    -45 -6
+
+tolerance  0.05 m
+accept    6409689.58688 8526306.26193
+expect    -41 -13
+
+tolerance  0.05 m
+accept    6671808.91963 7707735.72988
+expect    -38 -20
+
+tolerance  0.05 m
+accept    6725584.49173 7240461.99578
+expect    -37 -24
+
+tolerance  0.05 m
+accept    6729619.73995 6543762.57644
+expect    -36 -30
+
+tolerance  0.05 m
+accept    4710574.22344 6676097.81117
+expect    -57 -30
+
+tolerance  0.05 m
+accept    5000000.0 6750000.0
+expect    -54 -29.3674766667
+
+tolerance  0.05 m
+accept    5691318.14689 6937461.05067
+expect    -47 -27.5
+
+tolerance  0.05 m
+accept    6725584.49173 7240461.99578
+expect    -37 -24
+
+tolerance  0.05 m
+accept    7458947.70133 7313327.31691
+expect    -30 -22.5
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4674 +inv
+           +step +proj=poly +lat_0=0 +lon_0=-54 +x_0=5000000 +y_0=10000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -54 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -45 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -45 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -45 -6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -41 -13
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -38 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -37 -24
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -36 -30
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -57 -30
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -54 -29.3674766667
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -47 -27.5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -37 -24
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -30 -22.5
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5108.gie b/test/gigs/5108.gie
new file mode 100644
index 00000000..a5273a65
--- /dev/null
+++ b/test/gigs/5108.gie
@@ -0,0 +1,228 @@
+--------------------------------------------------------------------------------
+
+Test 5108, Cassini-Soldner, v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +init=epsg:3377
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    106 10
+expect    267186.017 881108.902
+
+tolerance  0.05 m
+accept    106 9
+expect    268006.024 770398.186
+
+tolerance  0.05 m
+accept    106 8
+expect    268740.351 659692.254
+
+tolerance  0.05 m
+accept    106 7
+expect    269388.786 548990.588
+
+tolerance  0.05 m
+accept    106 6
+expect    269951.141 438292.666
+
+tolerance  0.05 m
+accept    106 5
+expect    270427.255 327597.962
+
+tolerance  0.05 m
+accept    106 4
+expect    270816.99 216905.945
+
+tolerance  0.05 m
+accept    106 3
+expect    271120.234 106216.081
+
+tolerance  0.05 m
+accept    103.561065778 2.0424676812
+expect    0 0
+
+tolerance  0.05 m
+accept    103.64025984 1.82776484381
+expect    8813.252 -23740.095
+
+tolerance  0.05 m
+accept    106 1
+expect    271466.923 -115159.332
+
+tolerance  0.05 m
+accept    109 5
+expect    603116.703 329668.599
+
+tolerance  0.05 m
+accept    108 5
+expect    492221.308 328807.336
+
+tolerance  0.05 m
+accept    107 5
+expect    381324.74 328117.472
+
+tolerance  0.05 m
+accept    106 5
+expect    270427.255 327597.962
+
+tolerance  0.05 m
+accept    105 5
+expect    159529.111 327248.012
+
+tolerance  0.05 m
+accept    104 5
+expect    48630.563 327067.097
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3377 +inv
+           +step +init=epsg:4742
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    267186.017 881108.902
+expect    106 10
+
+tolerance  0.05 m
+accept    268006.024 770398.186
+expect    106 9
+
+tolerance  0.05 m
+accept    268740.351 659692.254
+expect    106 8
+
+tolerance  0.05 m
+accept    269388.786 548990.588
+expect    106 7
+
+tolerance  0.05 m
+accept    269951.141 438292.666
+expect    106 6
+
+tolerance  0.05 m
+accept    270427.255 327597.962
+expect    106 5
+
+tolerance  0.05 m
+accept    270816.99 216905.945
+expect    106 4
+
+tolerance  0.05 m
+accept    271120.234 106216.081
+expect    106 3
+
+tolerance  0.05 m
+accept    0 0
+expect    103.561065778 2.0424676812
+
+tolerance  0.05 m
+accept    8813.252 -23740.095
+expect    103.64025984 1.82776484381
+
+tolerance  0.05 m
+accept    271466.923 -115159.332
+expect    106 1
+
+tolerance  0.05 m
+accept    603116.703 329668.599
+expect    109 5
+
+tolerance  0.05 m
+accept    492221.308 328807.336
+expect    108 5
+
+tolerance  0.05 m
+accept    381324.74 328117.472
+expect    107 5
+
+tolerance  0.05 m
+accept    270427.255 327597.962
+expect    106 5
+
+tolerance  0.05 m
+accept    159529.111 327248.012
+expect    105 5
+
+tolerance  0.05 m
+accept    48630.563 327067.097
+expect    104 5
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4742 +inv
+           +step +init=epsg:3377
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    106 10
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 9
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 8
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 7
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 6
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 4
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 3
+roundtrip 1000
+
+tolerance  0.006 m
+accept    103.561065778 2.0424676812
+roundtrip 1000
+
+tolerance  0.006 m
+accept    103.64025984 1.82776484381
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 1
+roundtrip 1000
+
+tolerance  0.006 m
+accept    109 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    108 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    107 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    105 5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    104 5
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5109.gie b/test/gigs/5109.gie
new file mode 100644
index 00000000..a104e66f
--- /dev/null
+++ b/test/gigs/5109.gie
@@ -0,0 +1,180 @@
+--------------------------------------------------------------------------------
+
+Test 5109, Albers Equal Area, v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4283 +inv
+           +step +init=epsg:3577
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    132 0
+expect    0 0
+
+tolerance  0.05 m
+accept    132 -27
+expect    0 -2926820.89
+
+tolerance  0.05 m
+accept    140 0
+expect    966973.98 -30285.6
+
+tolerance  0.05 m
+accept    140 -20
+expect    832799.36 -2170181.93
+
+tolerance  0.05 m
+accept    140 -40
+expect    693250.21 -4395794.49
+
+tolerance  0.05 m
+accept    140 -60
+expect    567313.29 -6404311.16
+
+tolerance  0.05 m
+accept    140 -80
+expect    486878.674 -7687130.029
+
+tolerance  0.05 m
+accept    120 -60
+expect    -850274.75 -6426505.13
+
+tolerance  0.05 m
+accept    130 -60
+expect    -141915.26 -6387653.78
+
+tolerance  0.05 m
+accept    140 -60
+expect    567313.29 -6404311.16
+
+tolerance  0.05 m
+accept    150 -60
+expect    1273067.747 -6476375.276
+
+tolerance  0.05 m
+accept    160 -60
+expect    1971026.26 -6603404.82
+
+tolerance  0.05 m
+accept    170 -60
+expect    2656914.716 -6784621.89
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3577 +inv
+           +step +init=epsg:4283
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    0 0
+expect    132 0
+
+tolerance  0.05 m
+accept    0 -2926820.89
+expect    132 -27
+
+tolerance  0.05 m
+accept    966973.98 -30285.6
+expect    140 0
+
+tolerance  0.05 m
+accept    832799.36 -2170181.93
+expect    140 -20
+
+tolerance  0.05 m
+accept    693250.21 -4395794.49
+expect    140 -40
+
+tolerance  0.05 m
+accept    567313.29 -6404311.16
+expect    140 -60
+
+tolerance  0.05 m
+accept    486878.674 -7687130.029
+expect    140 -80
+
+tolerance  0.05 m
+accept    -850274.75 -6426505.13
+expect    120 -60
+
+tolerance  0.05 m
+accept    -141915.26 -6387653.78
+expect    130 -60
+
+tolerance  0.05 m
+accept    567313.29 -6404311.16
+expect    140 -60
+
+tolerance  0.05 m
+accept    1273067.747 -6476375.276
+expect    150 -60
+
+tolerance  0.05 m
+accept    1971026.26 -6603404.82
+expect    160 -60
+
+tolerance  0.05 m
+accept    2656914.716 -6784621.89
+expect    170 -60
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4283 +inv
+           +step +init=epsg:3577
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    132 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    132 -27
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -20
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -80
+roundtrip 1000
+
+tolerance  0.006 m
+accept    120 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    130 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    140 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    150 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    160 -60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    170 -60
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5110.gie b/test/gigs/5110.gie
new file mode 100644
index 00000000..031dfac9
--- /dev/null
+++ b/test/gigs/5110.gie
@@ -0,0 +1,156 @@
+--------------------------------------------------------------------------------
+
+Test 5110, Lambert Azimuthal Equal Area, v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4258 +inv
+           +step +init=epsg:3035
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    5 70
+expect    4127824.65822 5214090.649
+
+tolerance  0.05 m
+accept    5 60
+expect    4041548.13 4109791.66
+
+tolerance  0.05 m
+accept    5 50
+expect    3962799.45 2999718.853
+
+tolerance  0.05 m
+accept    5 40
+expect    3892127.02 1892578.962
+
+tolerance  0.05 m
+accept    5 30
+expect    3830117.9 796781.677
+
+tolerance  0.05 m
+accept    10 52
+expect    4321000.0 3210000.0
+
+tolerance  0.05 m
+accept    0.0 50.0
+expect    3606514.43 3036305.967
+
+tolerance  0.05 m
+accept    3.0 50.0
+expect    3819948.288 3011432.894
+
+tolerance  0.05 m
+accept    5.0 50.0
+expect    3962799.451 2999718.853
+
+tolerance  0.05 m
+accept    8.0 50.0
+expect    4177612.521 2989464.315
+
+tolerance  0.05 m
+accept    10.0 50.0
+expect    4321000.0 2987510.567
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3035 +inv
+           +step +init=epsg:4258
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    4127824.65822 5214090.649
+expect    5 70
+
+tolerance  0.05 m
+accept    4041548.13 4109791.66
+expect    5 60
+
+tolerance  0.05 m
+accept    3962799.45 2999718.853
+expect    5 50
+
+tolerance  0.05 m
+accept    3892127.02 1892578.962
+expect    5 40
+
+tolerance  0.05 m
+accept    3830117.9 796781.677
+expect    5 30
+
+tolerance  0.05 m
+accept    4321000.0 3210000.0
+expect    10 52
+
+tolerance  0.05 m
+accept    3606514.43 3036305.967
+expect    0.0 50.0
+
+tolerance  0.05 m
+accept    3819948.288 3011432.894
+expect    3.0 50.0
+
+tolerance  0.05 m
+accept    3962799.451 2999718.853
+expect    5.0 50.0
+
+tolerance  0.05 m
+accept    4177612.521 2989464.315
+expect    8.0 50.0
+
+tolerance  0.05 m
+accept    4321000.0 2987510.567
+expect    10.0 50.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4258 +inv
+           +step +init=epsg:3035
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    5 70
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 60
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 50
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 40
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5 30
+roundtrip 1000
+
+tolerance  0.006 m
+accept    10 52
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0.0 50.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.0 50.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    5.0 50.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    8.0 50.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    10.0 50.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5111.1.gie b/test/gigs/5111.1.gie
new file mode 100644
index 00000000..2517b185
--- /dev/null
+++ b/test/gigs/5111.1.gie
@@ -0,0 +1,444 @@
+--------------------------------------------------------------------------------
+
+Test 5111 (part 1), Mercator (variant A), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4211 +inv
+           +step +init=epsg:3001
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    100.0876483 77.6534822
+expect    2800000.0 15000000.0
+
+tolerance  0.05 m
+accept    100.0876483 73.1442856
+expect    2800000.0 13000000.0
+
+tolerance  0.05 m
+accept    100.0876483 67.0518325
+expect    2800000.0 11000000.0
+
+tolerance  0.05 m
+accept    100.0876483 58.9140458
+expect    2800000.0 9000000.0
+
+tolerance  0.05 m
+accept    100.0876483 48.2638981
+expect    2800000.0 7000000.0
+
+tolerance  0.05 m
+accept    100.0876483 34.8029044
+expect    2800000.0 5000000.0
+
+tolerance  0.05 m
+accept    100.0876483 18.7048581
+expect    2800000.0 3000000.0
+
+tolerance  0.05 m
+accept    100.0876483 0.9071392
+expect    2800000.0 1000000.0
+
+tolerance  0.05 m
+accept    110.0 0.0
+expect    3900000.0 900000.0
+
+tolerance  0.05 m
+accept    100.0876483 -0.9071392
+expect    2800000.0 800000.0
+
+tolerance  0.05 m
+accept    100.0876483 -1.8140483
+expect    2800000.0 700000.0
+
+tolerance  0.05 m
+accept    100.0876483 -2.0
+expect    2800000.0 679490.65
+
+tolerance  0.05 m
+accept    100.0876483 -3.6262553
+expect    2800000.0 500000.0
+
+tolerance  0.05 m
+accept    100.0876483 -4.531095
+expect    2800000.0 400000.0
+
+tolerance  0.05 m
+accept    100.0876483 -5.4347892
+expect    2800000.0 300000.0
+
+tolerance  0.05 m
+accept    100.0876483 -6.3371111
+expect    2800000.0 200000.0
+
+tolerance  0.05 m
+accept    100.0876483 -7.2378372
+expect    2800000.0 100000.0
+
+tolerance  0.05 m
+accept    74.8562083 -8.136745
+expect    0.0 0.0
+
+tolerance  0.05 m
+accept    -71.0 -2.0
+expect    23764105.84 679490.65
+
+tolerance  0.05 m
+accept    -90.0 -2.0
+expect    21655625.33 679490.65
+
+tolerance  0.05 m
+accept    -120.0 -2.0
+expect    18326445.58 679490.65
+
+tolerance  0.05 m
+accept    -150.0 -2.0
+expect    14997265.83 679490.65
+
+tolerance  0.05 m
+accept    180.0 -2.0
+expect    11668086.08 679490.65
+
+tolerance  0.05 m
+accept    150.0 -2.0
+expect    8338906.33 679490.65
+
+tolerance  0.05 m
+accept    120.0 -2.0
+expect    5009726.58 679490.65
+
+tolerance  0.05 m
+accept    110.0 -2.0
+expect    3900000.0 679490.65
+
+tolerance  0.05 m
+accept    106.8077194 -2.0
+expect    3545744.14 679490.65
+
+tolerance  0.05 m
+accept    100.0876483 -2.0
+expect    2800000.0 679490.65
+
+tolerance  0.05 m
+accept    90.0 -2.0
+expect    1680546.83 679490.65
+
+tolerance  0.05 m
+accept    60.0 -2.0
+expect    -1648632.92 679490.65
+
+tolerance  0.05 m
+accept    30.0 -2.0
+expect    -4977812.67 679490.65
+
+tolerance  0.05 m
+accept    0.0 -2.0
+expect    -8306992.42 679490.65
+
+tolerance  0.05 m
+accept    -30.0 -2.0
+expect    -11636172.17 679490.65
+
+tolerance  0.05 m
+accept    -60.0 -2.0
+expect    -14965351.92 679490.65
+
+tolerance  0.05 m
+accept    -69.0 -2.0
+expect    -15964105.84 679490.65
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3001 +inv
+           +step +init=epsg:4211
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    2800000.0 15000000.0
+expect    100.0876483 77.6534822
+
+tolerance  0.05 m
+accept    2800000.0 13000000.0
+expect    100.0876483 73.1442856
+
+tolerance  0.05 m
+accept    2800000.0 11000000.0
+expect    100.0876483 67.0518325
+
+tolerance  0.05 m
+accept    2800000.0 9000000.0
+expect    100.0876483 58.9140458
+
+tolerance  0.05 m
+accept    2800000.0 7000000.0
+expect    100.0876483 48.2638981
+
+tolerance  0.05 m
+accept    2800000.0 5000000.0
+expect    100.0876483 34.8029044
+
+tolerance  0.05 m
+accept    2800000.0 3000000.0
+expect    100.0876483 18.7048581
+
+tolerance  0.05 m
+accept    2800000.0 1000000.0
+expect    100.0876483 0.9071392
+
+tolerance  0.05 m
+accept    3900000.0 900000.0
+expect    110.0 0.0
+
+tolerance  0.05 m
+accept    2800000.0 800000.0
+expect    100.0876483 -0.9071392
+
+tolerance  0.05 m
+accept    2800000.0 700000.0
+expect    100.0876483 -1.8140483
+
+tolerance  0.05 m
+accept    2800000.0 679490.65
+expect    100.0876483 -2.0
+
+tolerance  0.05 m
+accept    2800000.0 500000.0
+expect    100.0876483 -3.6262553
+
+tolerance  0.05 m
+accept    2800000.0 400000.0
+expect    100.0876483 -4.531095
+
+tolerance  0.05 m
+accept    2800000.0 300000.0
+expect    100.0876483 -5.4347892
+
+tolerance  0.05 m
+accept    2800000.0 200000.0
+expect    100.0876483 -6.3371111
+
+tolerance  0.05 m
+accept    2800000.0 100000.0
+expect    100.0876483 -7.2378372
+
+tolerance  0.05 m
+accept    0.0 0.0
+expect    74.8562083 -8.136745
+
+tolerance  0.05 m
+accept    23764105.84 679490.65
+expect    -71.0 -2.0
+
+tolerance  0.05 m
+accept    21655625.33 679490.65
+expect    -90.0 -2.0
+
+tolerance  0.05 m
+accept    18326445.58 679490.65
+expect    -120.0 -2.0
+
+tolerance  0.05 m
+accept    14997265.83 679490.65
+expect    -150.0 -2.0
+
+tolerance  0.05 m
+accept    11668086.08 679490.65
+expect    180.0 -2.0
+
+tolerance  0.05 m
+accept    8338906.33 679490.65
+expect    150.0 -2.0
+
+tolerance  0.05 m
+accept    5009726.58 679490.65
+expect    120.0 -2.0
+
+tolerance  0.05 m
+accept    3900000.0 679490.65
+expect    110.0 -2.0
+
+tolerance  0.05 m
+accept    3545744.14 679490.65
+expect    106.8077194 -2.0
+
+tolerance  0.05 m
+accept    2800000.0 679490.65
+expect    100.0876483 -2.0
+
+tolerance  0.05 m
+accept    1680546.83 679490.65
+expect    90.0 -2.0
+
+tolerance  0.05 m
+accept    -1648632.92 679490.65
+expect    60.0 -2.0
+
+tolerance  0.05 m
+accept    -4977812.67 679490.65
+expect    30.0 -2.0
+
+tolerance  0.05 m
+accept    -8306992.42 679490.65
+expect    0.0 -2.0
+
+tolerance  0.05 m
+accept    -11636172.17 679490.65
+expect    -30.0 -2.0
+
+tolerance  0.05 m
+accept    -14965351.92 679490.65
+expect    -60.0 -2.0
+
+tolerance  0.05 m
+accept    -15964105.84 679490.65
+expect    -69.0 -2.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4211 +inv
+           +step +init=epsg:3001
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    100.0876483 77.6534822
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 73.1442856
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 67.0518325
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 58.9140458
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 48.2638981
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 34.8029044
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 18.7048581
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 0.9071392
+roundtrip 1000
+
+tolerance  0.006 m
+accept    110.0 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -0.9071392
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -1.8140483
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -3.6262553
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -4.531095
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -5.4347892
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -6.3371111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -7.2378372
+roundtrip 1000
+
+tolerance  0.006 m
+accept    74.8562083 -8.136745
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -71.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -90.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -120.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -150.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    180.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    150.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    120.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    110.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    106.8077194 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    100.0876483 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    90.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    60.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    30.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -30.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -60.0 -2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -69.0 -2.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5111.2.gie b/test/gigs/5111.2.gie
new file mode 100644
index 00000000..dfa6bca2
--- /dev/null
+++ b/test/gigs/5111.2.gie
@@ -0,0 +1,444 @@
+--------------------------------------------------------------------------------
+
+Test 5111 (part 2), Mercator (variant A), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4813 +inv
+           +step +proj=merc +lon_0=110 +k=0.997 +x_0=3900000 +y_0=900000 +ellps=bessel +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    -6.7200711 77.6534822
+expect    2800000.0 15000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 73.1442856
+expect    2800000.0 13000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 67.0518325
+expect    2800000.0 11000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 58.9140458
+expect    2800000.0 9000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 48.2638981
+expect    2800000.0 7000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 34.8029044
+expect    2800000.0 5000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 18.7048581
+expect    2800000.0 3000000.0
+
+tolerance  0.05 m
+accept    -6.7200711 0.9071392
+expect    2800000.0 1000000.0
+
+tolerance  0.05 m
+accept    3.1922806 0.0
+expect    3900000.0 900000.0
+
+tolerance  0.05 m
+accept    -6.7200711 0.9071392
+expect    2800000.0 800000.0
+
+tolerance  0.05 m
+accept    -6.7200711 1.8140483
+expect    2800000.0 700000.0
+
+tolerance  0.05 m
+accept    -6.7200711 2.0
+expect    2800000.0 679490.65
+
+tolerance  0.05 m
+accept    -6.7200711 3.6262553
+expect    2800000.0 500000.0
+
+tolerance  0.05 m
+accept    -6.7200711 4.531095
+expect    2800000.0 400000.0
+
+tolerance  0.05 m
+accept    -6.7200711 5.4347892
+expect    2800000.0 300000.0
+
+tolerance  0.05 m
+accept    -6.7200711 6.3371111
+expect    2800000.0 200000.0
+
+tolerance  0.05 m
+accept    -6.7200711 7.2378372
+expect    2800000.0 100000.0
+
+tolerance  0.05 m
+accept    -31.9515111 8.136745
+expect    0.0 0.0
+
+tolerance  0.05 m
+accept    -177.8077194 2.0
+expect    23764105.84 679490.65
+
+tolerance  0.05 m
+accept    163.1922806 2.0
+expect    21655625.33 679490.65
+
+tolerance  0.05 m
+accept    133.1922806 2.0
+expect    18326445.58 679490.65
+
+tolerance  0.05 m
+accept    103.1922806 2.0
+expect    14997265.83 679490.65
+
+tolerance  0.05 m
+accept    73.1922806 2.0
+expect    11668086.08 679490.65
+
+tolerance  0.05 m
+accept    43.1922806 2.0
+expect    8338906.33 679490.65
+
+tolerance  0.05 m
+accept    13.1922806 2.0
+expect    5009726.58 679490.65
+
+tolerance  0.05 m
+accept    3.1922806 2.0
+expect    3900000.0 679490.65
+
+tolerance  0.05 m
+accept    0.0 2.0
+expect    3545744.14 679490.65
+
+tolerance  0.05 m
+accept    -6.7200711 2.0
+expect    2800000.0 679490.65
+
+tolerance  0.05 m
+accept    -16.8077194 2.0
+expect    1680546.83 679490.65
+
+tolerance  0.05 m
+accept    -46.8077194 2.0
+expect    -1648632.92 679490.65
+
+tolerance  0.05 m
+accept    -76.8077194 2.0
+expect    -4977812.67 679490.65
+
+tolerance  0.05 m
+accept    -106.8077194 2.0
+expect    -8306992.42 679490.65
+
+tolerance  0.05 m
+accept    -136.8077194 2.0
+expect    -11636172.17 679490.65
+
+tolerance  0.05 m
+accept    -166.8077194 2.0
+expect    -14965351.92 679490.65
+
+tolerance  0.05 m
+accept    -175.8077194 2.0
+expect    -15964105.84 679490.65
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +proj=merc +lon_0=110 +k=0.997 +x_0=3900000 +y_0=900000 +ellps=bessel +units=m +no_defs +inv
+           +step +init=epsg:4813
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    2800000.0 15000000.0
+expect    -6.7200711 77.6534822
+
+tolerance  0.05 m
+accept    2800000.0 13000000.0
+expect    -6.7200711 73.1442856
+
+tolerance  0.05 m
+accept    2800000.0 11000000.0
+expect    -6.7200711 67.0518325
+
+tolerance  0.05 m
+accept    2800000.0 9000000.0
+expect    -6.7200711 58.9140458
+
+tolerance  0.05 m
+accept    2800000.0 7000000.0
+expect    -6.7200711 48.2638981
+
+tolerance  0.05 m
+accept    2800000.0 5000000.0
+expect    -6.7200711 34.8029044
+
+tolerance  0.05 m
+accept    2800000.0 3000000.0
+expect    -6.7200711 18.7048581
+
+tolerance  0.05 m
+accept    2800000.0 1000000.0
+expect    -6.7200711 0.9071392
+
+tolerance  0.05 m
+accept    3900000.0 900000.0
+expect    3.1922806 0.0
+
+tolerance  0.05 m
+accept    2800000.0 800000.0
+expect    -6.7200711 0.9071392
+
+tolerance  0.05 m
+accept    2800000.0 700000.0
+expect    -6.7200711 1.8140483
+
+tolerance  0.05 m
+accept    2800000.0 679490.65
+expect    -6.7200711 2.0
+
+tolerance  0.05 m
+accept    2800000.0 500000.0
+expect    -6.7200711 3.6262553
+
+tolerance  0.05 m
+accept    2800000.0 400000.0
+expect    -6.7200711 4.531095
+
+tolerance  0.05 m
+accept    2800000.0 300000.0
+expect    -6.7200711 5.4347892
+
+tolerance  0.05 m
+accept    2800000.0 200000.0
+expect    -6.7200711 6.3371111
+
+tolerance  0.05 m
+accept    2800000.0 100000.0
+expect    -6.7200711 7.2378372
+
+tolerance  0.05 m
+accept    0.0 0.0
+expect    -31.9515111 8.136745
+
+tolerance  0.05 m
+accept    23764105.84 679490.65
+expect    -177.8077194 2.0
+
+tolerance  0.05 m
+accept    21655625.33 679490.65
+expect    163.1922806 2.0
+
+tolerance  0.05 m
+accept    18326445.58 679490.65
+expect    133.1922806 2.0
+
+tolerance  0.05 m
+accept    14997265.83 679490.65
+expect    103.1922806 2.0
+
+tolerance  0.05 m
+accept    11668086.08 679490.65
+expect    73.1922806 2.0
+
+tolerance  0.05 m
+accept    8338906.33 679490.65
+expect    43.1922806 2.0
+
+tolerance  0.05 m
+accept    5009726.58 679490.65
+expect    13.1922806 2.0
+
+tolerance  0.05 m
+accept    3900000.0 679490.65
+expect    3.1922806 2.0
+
+tolerance  0.05 m
+accept    3545744.14 679490.65
+expect    0.0 2.0
+
+tolerance  0.05 m
+accept    2800000.0 679490.65
+expect    -6.7200711 2.0
+
+tolerance  0.05 m
+accept    1680546.83 679490.65
+expect    -16.8077194 2.0
+
+tolerance  0.05 m
+accept    -1648632.92 679490.65
+expect    -46.8077194 2.0
+
+tolerance  0.05 m
+accept    -4977812.67 679490.65
+expect    -76.8077194 2.0
+
+tolerance  0.05 m
+accept    -8306992.42 679490.65
+expect    -106.8077194 2.0
+
+tolerance  0.05 m
+accept    -11636172.17 679490.65
+expect    -136.8077194 2.0
+
+tolerance  0.05 m
+accept    -14965351.92 679490.65
+expect    -166.8077194 2.0
+
+tolerance  0.05 m
+accept    -15964105.84 679490.65
+expect    -175.8077194 2.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4813 +inv
+           +step +proj=merc +lon_0=110 +k=0.997 +x_0=3900000 +y_0=900000 +ellps=bessel +units=m +no_defs
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    -6.7200711 77.6534822
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 73.1442856
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 67.0518325
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 58.9140458
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 48.2638981
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 34.8029044
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 18.7048581
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 0.9071392
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.1922806 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 0.9071392
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 1.8140483
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 3.6262553
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 4.531095
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 5.4347892
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 6.3371111
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 7.2378372
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -31.9515111 8.136745
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -177.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    163.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    133.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    103.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    73.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    43.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    13.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    3.1922806 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    0.0 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -6.7200711 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -16.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -46.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -76.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -106.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -136.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -166.8077194 2.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    -175.8077194 2.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5112.gie b/test/gigs/5112.gie
new file mode 100644
index 00000000..3c4bb367
--- /dev/null
+++ b/test/gigs/5112.gie
@@ -0,0 +1,84 @@
+--------------------------------------------------------------------------------
+
+Test 5112, Mercator (variant B),  v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4284 +inv
+           +step +init=epsg:3388
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    51.0 42.0
+expect    0.0 3819897.85
+
+tolerance  0.05 m
+accept    51.0 0.0
+expect    0.0 0.0
+
+tolerance  0.05 m
+accept    57.0 0.0
+expect    497112.88 0.0
+
+tolerance  0.05 m
+accept    54.0 20.5
+expect    248556.44 1724781.5
+
+tolerance  0.05 m
+accept    67.0 -41.0
+expect    1325634.35 -3709687.25
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:3388 +inv
+           +step +init=epsg:4284
+--------------------------------------------------------------------------------
+tolerance  0.05 m
+accept    0.0 3819897.85
+expect    51.0 42.0
+
+tolerance  0.05 m
+accept    0.0 0.0
+expect    51.0 0.0
+
+tolerance  0.05 m
+accept    497112.88 0.0
+expect    57.0 0.0
+
+tolerance  0.05 m
+accept    248556.44 1724781.5
+expect    54.0 20.5
+
+tolerance  0.05 m
+accept    1325634.35 -3709687.25
+expect    67.0 -41.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4284 +inv
+           +step +init=epsg:3388
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    51.0 42.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    51.0 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    57.0 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    54.0 20.5
+roundtrip 1000
+
+tolerance  0.006 m
+accept    67.0 -41.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5113.gie b/test/gigs/5113.gie
new file mode 100644
index 00000000..5c3904e7
--- /dev/null
+++ b/test/gigs/5113.gie
@@ -0,0 +1,84 @@
+--------------------------------------------------------------------------------
+
+Test 5113, Transverse Mercator (South Oriented), v2-0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4148 +inv
+           +step +init=epsg:2049
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    22.5 0.0
+expect    -166998.44 0.0
+
+tolerance  0.03 m
+accept    21.5 -25.0
+expect    -50475.46 2766147.25
+
+tolerance  0.03 m
+accept    20.5 -30.0
+expect    48243.45 3320218.65
+
+tolerance  0.03 m
+accept    19.5 -35.0
+expect    136937.65 3875621.18
+
+tolerance  0.03 m
+accept    19.5 -35.0
+expect    136937.65 3875621.18
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:2049 +inv
+           +step +init=epsg:4148
+--------------------------------------------------------------------------------
+tolerance  0.03 m
+accept    -166998.44 0.0
+expect    22.5 0.0
+
+tolerance  0.03 m
+accept    -50475.46 2766147.25
+expect    21.5 -25.0
+
+tolerance  0.03 m
+accept    48243.45 3320218.65
+expect    20.5 -30.0
+
+tolerance  0.03 m
+accept    136937.65 3875621.18
+expect    19.5 -35.0
+
+tolerance  0.03 m
+accept    136937.65 3875621.18
+expect    19.5 -35.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4148 +inv
+           +step +init=epsg:2049
+--------------------------------------------------------------------------------
+tolerance  0.006 m
+accept    22.5 0.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    21.5 -25.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    20.5 -30.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    19.5 -35.0
+roundtrip 1000
+
+tolerance  0.006 m
+accept    19.5 -35.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5201.gie b/test/gigs/5201.gie
new file mode 100644
index 00000000..e7bdcb1e
--- /dev/null
+++ b/test/gigs/5201.gie
@@ -0,0 +1,348 @@
+--------------------------------------------------------------------------------
+
+Test 5201, Geographic Geocentric conversions, v2.0_2011-09-28. (EPSG 4979 - WGS84 3d has been replaced with EPSG code 4326 WGS84 2d).
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4978 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -962479.5924 555687.8517 6260738.6526
+expect    150 80 1214.137
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -962297.0059 555582.4354 6259542.961
+expect    150 80 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -1598248.169 2768777.623 5501278.468
+expect    119.99524538 60.00475191 619.6317
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -1598023.169 2768387.912 5500499.045
+expect    119.9952447 60.00475258 -280.3683
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    2764210.4054 4787752.865 3170468.5199
+expect    60 30 189.569
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    2764128.3196 4787610.6883 3170373.7354
+expect    60 30 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    6377934.396 -112 434
+expect    -0.00100615 0.00392509 -202.5882
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    6374934.396 -112 434
+expect    -0.00100662 0.00392695 -3202.5881
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    6367934.396 -112 434
+expect    -0.00100773 0.00393129 -10202.5881
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    2764128.3196 -4787610.6883 -3170373.7354
+expect    -60 -30 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    2763900.3489 -4787215.8313 -3170110.4974
+expect    -60 -30 -526.476
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    2763880.8633 -4787182.0813 -3170087.9974
+expect    -60 -30 -571.476
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -1598023.169 -2768611.912 -5499631.045
+expect    -119.99323757 -59.99934884 -935.0995
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -1597798.169 -2768222.201 -5498851.622
+expect    -119.99323663 -59.99934874 -1835.0995
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -962297.0059 -555582.4354 -6259542.961
+expect    -150 -80 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -962150.945 -555498.1071 -6258586.4616
+expect    -150 -80 -971.255
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -961798.2951 -555294.5046 -6256277.0874
+expect    -150 -80 -3316.255
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -2187336.719 -112 5971017.093
+expect    -179.99706624 70.00490733 -223.6178
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -2904698.5551 -2904698.5551 4862789.0377
+expect    -135 50 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    371 -5783593.614 2679326.11
+expect    -89.99632465 25.00366329 -274.7286
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    6378137 0 0
+expect    0 0 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -4087095.478 2977467.559 -3875457.429
+expect    143.92649252 -37.65282217 737.7182
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -4085919.959 2976611.233 -3874335.274
+expect    143.92649211 -37.65282206 -1099.2288
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -4084000.165 2975212.729 -3872502.631
+expect    143.92649143 -37.65282187 -4099.2288
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -4079520.647 2971949.553 -3868226.465
+expect    143.92648984 -37.65282143 -11099.2288
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -2904698.5551 2904698.5551 -4862789.0377
+expect    135 -50 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -2187336.719 -112 -5970149.093
+expect    -179.99706624 -70.00224647 -1039.2896
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:4978
+--------------------------------------------------------------------------------
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    150 80 1214.137
+expect    -962479.5924 555687.8517 6260738.6526
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    150 80 0
+expect    -962297.0059 555582.4354 6259542.961
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    119.99524538 60.00475191 619.6317
+expect    -1598248.169 2768777.623 5501278.468
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    119.9952447 60.00475258 -280.3683
+expect    -1598023.169 2768387.912 5500499.045
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    60 30 189.569
+expect    2764210.4054 4787752.865 3170468.5199
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    60 30 0
+expect    2764128.3196 4787610.6883 3170373.7354
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -0.00100615 0.00392509 -202.5882
+expect    6377934.396 -112 434
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -0.00100662 0.00392695 -3202.5881
+expect    6374934.396 -112 434
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -0.00100773 0.00393129 -10202.5881
+expect    6367934.396 -112 434
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -60 -30 0
+expect    2764128.3196 -4787610.6883 -3170373.7354
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -60 -30 -526.476
+expect    2763900.3489 -4787215.8313 -3170110.4974
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -60 -30 -571.476
+expect    2763880.8633 -4787182.0813 -3170087.9974
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -119.99323757 -59.99934884 -935.0995
+expect    -1598023.169 -2768611.912 -5499631.045
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -119.99323663 -59.99934874 -1835.0995
+expect    -1597798.169 -2768222.201 -5498851.622
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -150 -80 0
+expect    -962297.0059 -555582.4354 -6259542.961
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -150 -80 -971.255
+expect    -962150.945 -555498.1071 -6258586.4616
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -150 -80 -3316.255
+expect    -961798.2951 -555294.5046 -6256277.0874
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -179.99706624 70.00490733 -223.6178
+expect    -2187336.719 -112 5971017.093
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -135 50 0
+expect    -2904698.5551 -2904698.5551 4862789.0377
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -89.99632465 25.00366329 -274.7286
+expect    371 -5783593.614 2679326.11
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    0 0 0
+expect    6378137 0 0
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    143.92649252 -37.65282217 737.7182
+expect    -4087095.478 2977467.559 -3875457.429
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    143.92649211 -37.65282206 -1099.2288
+expect    -4085919.959 2976611.233 -3874335.274
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    143.92649143 -37.65282187 -4099.2288
+expect    -4084000.165 2975212.729 -3872502.631
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    143.92648984 -37.65282143 -11099.2288
+expect    -4079520.647 2971949.553 -3868226.465
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    135 -50 0
+expect    -2904698.5551 2904698.5551 -4862789.0377
+
+tolerance  [8.333333333333333e-08, 8.333333333333333e-08, 0.01] m
+accept    -179.99706624 -70.00224647 -1039.2896
+expect    -2187336.719 -112 -5970149.093
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4978 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -962479.5924 555687.8517 6260738.6526
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -962297.0059 555582.4354 6259542.961
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -1598248.169 2768777.623 5501278.468
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -1598023.169 2768387.912 5500499.045
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    2764210.4054 4787752.865 3170468.5199
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    2764128.3196 4787610.6883 3170373.7354
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    6377934.396 -112 434
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    6374934.396 -112 434
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    6367934.396 -112 434
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    2764128.3196 -4787610.6883 -3170373.7354
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    2763900.3489 -4787215.8313 -3170110.4974
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    2763880.8633 -4787182.0813 -3170087.9974
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -1598023.169 -2768611.912 -5499631.045
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -1597798.169 -2768222.201 -5498851.622
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -962297.0059 -555582.4354 -6259542.961
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -962150.945 -555498.1071 -6258586.4616
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -961798.2951 -555294.5046 -6256277.0874
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -2187336.719 -112 5971017.093
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -2904698.5551 -2904698.5551 4862789.0377
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    371 -5783593.614 2679326.11
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    6378137 0 0
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -4087095.478 2977467.559 -3875457.429
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -4085919.959 2976611.233 -3874335.274
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -4084000.165 2975212.729 -3872502.631
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -4079520.647 2971949.553 -3868226.465
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -2904698.5551 2904698.5551 -4862789.0377
+roundtrip 1000
+
+tolerance  [5.555555555555556e-08, 5.555555555555556e-08, 0.006] m
+accept    -2187336.719 -112 -5970149.093
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5203.1.gie b/test/gigs/5203.1.gie
new file mode 100644
index 00000000..960b9171
--- /dev/null
+++ b/test/gigs/5203.1.gie
@@ -0,0 +1,192 @@
+--------------------------------------------------------------------------------
+
+GIGS Test 5203 (part 1), Position Vector 7-parameter transformation, v2.0_2011-06-28. Geographic 2D domain (EPSG method code 9606).
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4277 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    150.00567472 79.99487333
+expect    150.0 80.0
+
+tolerance  2.77777777778e-07 m
+accept    120.0 60.0
+expect    119.99435889 60.00569306
+
+tolerance  2.77777777778e-07 m
+accept    60.00446778 29.99566778
+expect    60.0 30.0
+
+tolerance  2.77777777778e-07 m
+accept    0.0 0.0
+expect    -0.00089056 0.00483333
+
+tolerance  2.77777777778e-07 m
+accept    -60.00357056 -30.00504639
+expect    -60.0 -30.0
+
+tolerance  2.77777777778e-07 m
+accept    -120.0 -60.0
+expect    -119.9918525 -59.99907361
+
+tolerance  2.77777777778e-07 m
+accept    -150.01693111 -79.99778139
+expect    -150.0 -80.0
+
+tolerance  2.77777777778e-07 m
+accept    -180.0 70.0
+expect    -179.99637361 70.005945
+
+tolerance  2.77777777778e-07 m
+accept    -135.00596333 49.99458694
+expect    -135.0 50.0
+
+tolerance  2.77777777778e-07 m
+accept    -90.0 25.0
+expect    -89.99531139 25.00445833
+
+tolerance  2.77777777778e-07 m
+accept    0.00089056 -0.00483333
+expect    0.0 0.0
+
+tolerance  2.77777777778e-07 m
+accept    143.9279419 -37.6532236
+expect    143.92634806 -37.65235306
+
+tolerance  2.77777777778e-07 m
+accept    135.00291194 -49.99973028
+expect    135.0 -50.0
+
+tolerance  2.77777777778e-07 m
+accept    180.0 -70.0
+expect    -179.99660139 -70.002485
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:4277
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    150.0 80.0
+expect    150.00567472 79.99487333
+
+tolerance  2.77777777778e-07 m
+accept    119.99435889 60.00569306
+expect    120.0 60.0
+
+tolerance  2.77777777778e-07 m
+accept    60.0 30.0
+expect    60.00446778 29.99566778
+
+tolerance  2.77777777778e-07 m
+accept    -0.00089056 0.00483333
+expect    0.0 0.0
+
+tolerance  2.77777777778e-07 m
+accept    -60.0 -30.0
+expect    -60.00357056 -30.00504639
+
+tolerance  2.77777777778e-07 m
+accept    -119.9918525 -59.99907361
+expect    -120.0 -60.0
+
+tolerance  2.77777777778e-07 m
+accept    -150.0 -80.0
+expect    -150.01693111 -79.99778139
+
+tolerance  2.77777777778e-07 m
+accept    -179.99637361 70.005945
+expect    -180.0 70.0
+
+tolerance  2.77777777778e-07 m
+accept    -135.0 50.0
+expect    -135.00596333 49.99458694
+
+tolerance  2.77777777778e-07 m
+accept    -89.99531139 25.00445833
+expect    -90.0 25.0
+
+tolerance  2.77777777778e-07 m
+accept    0.0 0.0
+expect    0.00089056 -0.00483333
+
+tolerance  2.77777777778e-07 m
+accept    143.92634806 -37.65235306
+expect    143.9279419 -37.6532236
+
+tolerance  2.77777777778e-07 m
+accept    135.0 -50.0
+expect    135.00291194 -49.99973028
+
+tolerance  2.77777777778e-07 m
+accept    -179.99660139 -70.002485
+expect    180.0 -70.0
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4277 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    150.00567472 79.99487333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    120.0 60.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    60.00446778 29.99566778
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    0.0 0.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -60.00357056 -30.00504639
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -120.0 -60.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -150.01693111 -79.99778139
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -180.0 70.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -135.00596333 49.99458694
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -90.0 25.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    0.00089056 -0.00483333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    143.9279419 -37.6532236
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    135.00291194 -49.99973028
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    180.0 -70.0
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5204.1.gie b/test/gigs/5204.1.gie
new file mode 100644
index 00000000..3c7e3fff
--- /dev/null
+++ b/test/gigs/5204.1.gie
@@ -0,0 +1,192 @@
+--------------------------------------------------------------------------------
+
+GIGS Test 5204, Coordinate Frame 7-parameter transformation, v2.0_2011-06-28. Geographic 2D domain (EPSG method code 9607)
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4313 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    149.99825389 80.00155167
+expect    150 80
+
+tolerance  2.77777777778e-07 m
+accept    120 60
+expect    120.00197111 59.99807333
+
+tolerance  2.77777777778e-07 m
+accept    59.99822194 30.00134083
+expect    60 30
+
+tolerance  2.77777777778e-07 m
+accept    0 0
+expect    0.00098139 -0.00081028
+
+tolerance  2.77777777778e-07 m
+accept    -59.99991333 -29.99943917
+expect    -60 -30
+
+tolerance  2.77777777778e-07 m
+accept    -120 -60
+expect    -120.00150694 -59.999835
+
+tolerance  2.77777777778e-07 m
+accept    -149.99532167 -80.00054917
+expect    -150 -80
+
+tolerance  2.77777777778e-07 m
+accept    -180 70
+expect    179.99939778 69.99812806
+
+tolerance  2.77777777778e-07 m
+accept    -134.99891389 50.00183
+expect    -135 50
+
+tolerance  2.77777777778e-07 m
+accept    -90 25
+expect    -90.00060583 24.99862667
+
+tolerance  2.77777777778e-07 m
+accept    -0.00098139 0.00081028
+expect    0 0
+
+tolerance  2.77777777778e-07 m
+accept    143.9279419 -37.6532236
+expect    143.92857222 -37.65257083
+
+tolerance  2.77777777778e-07 m
+accept    134.99913472 -50.00096139
+expect    135 -50
+
+tolerance  2.77777777778e-07 m
+accept    180 -70
+expect    179.99888667 -69.99901667
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:4313
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    150 80
+expect    149.99825389 80.00155167
+
+tolerance  2.77777777778e-07 m
+accept    120.00197111 59.99807333
+expect    120 60
+
+tolerance  2.77777777778e-07 m
+accept    60 30
+expect    59.99822194 30.00134083
+
+tolerance  2.77777777778e-07 m
+accept    0.00098139 -0.00081028
+expect    0 0
+
+tolerance  2.77777777778e-07 m
+accept    -60 -30
+expect    -59.99991333 -29.99943917
+
+tolerance  2.77777777778e-07 m
+accept    -120.00150694 -59.999835
+expect    -120 -60
+
+tolerance  2.77777777778e-07 m
+accept    -150 -80
+expect    -149.99532167 -80.00054917
+
+tolerance  2.77777777778e-07 m
+accept    179.99939778 69.99812806
+expect    -180 70
+
+tolerance  2.77777777778e-07 m
+accept    -135 50
+expect    -134.99891389 50.00183
+
+tolerance  2.77777777778e-07 m
+accept    -90.00060583 24.99862667
+expect    -90 25
+
+tolerance  2.77777777778e-07 m
+accept    0 0
+expect    -0.00098139 0.00081028
+
+tolerance  2.77777777778e-07 m
+accept    143.92857222 -37.65257083
+expect    143.9279419 -37.6532236
+
+tolerance  2.77777777778e-07 m
+accept    135 -50
+expect    134.99913472 -50.00096139
+
+tolerance  2.77777777778e-07 m
+accept    179.99888667 -69.99901667
+expect    180 -70
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4313 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    149.99825389 80.00155167
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    120 60
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    59.99822194 30.00134083
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    0 0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -59.99991333 -29.99943917
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -120 -60
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -149.99532167 -80.00054917
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -180 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -134.99891389 50.00183
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -90 25
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -0.00098139 0.00081028
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    143.9279419 -37.6532236
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    134.99913472 -50.00096139
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    180 -70
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5205.1.gie b/test/gigs/5205.1.gie
new file mode 100644
index 00000000..df4cb674
--- /dev/null
+++ b/test/gigs/5205.1.gie
@@ -0,0 +1,192 @@
+--------------------------------------------------------------------------------
+
+GIGS Test 5205 (Part 1), Molodensky-Badekas 10-parameter transformation, v2.0_2011-06-28. Geographic 2D domain (EPSG method code 9636)
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4289 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    150.01814371 79.99494639
+expect    150 80
+
+tolerance  2.77777777778e-07 m
+accept    120 60
+expect    119.99001559 60.00441792
+
+tolerance  2.77777777778e-07 m
+accept    60.00535007 29.99746103
+expect    60 30
+
+tolerance  2.77777777778e-07 m
+accept    0 0
+expect    -7.025e-05 0.0041133
+
+tolerance  2.77777777778e-07 m
+accept    -60.00473241 -30.0042486
+expect    -60 -30
+
+tolerance  2.77777777778e-07 m
+accept    -120 -60
+expect    -119.9922412 -60.00081456
+
+tolerance  2.77777777778e-07 m
+accept    -150.01209192 -79.99612229
+expect    -150 -80
+
+tolerance  2.77777777778e-07 m
+accept    -180 70
+expect    179.99786174 70.00666951
+
+tolerance  2.77777777778e-07 m
+accept    -135.00454845 49.99357566
+expect    -135 50
+
+tolerance  2.77777777778e-07 m
+accept    -90 25
+expect    -89.99487454 25.00457271
+
+tolerance  2.77777777778e-07 m
+accept    7.032e-05 -0.00411349
+expect    0 0
+
+tolerance  2.77777777778e-07 m
+accept    143.9279419 -37.6532236
+expect    143.92330599 -37.65282034
+
+tolerance  2.77777777778e-07 m
+accept    135.00641074 -49.99958243
+expect    135 -50
+
+tolerance  2.77777777778e-07 m
+accept    180 -70
+expect    179.99847886 -70.00362084
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4326 +inv
+           +step +init=epsg:4289
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    150 80
+expect    150.01814371 79.99494639
+
+tolerance  2.77777777778e-07 m
+accept    119.99001559 60.00441792
+expect    120 60
+
+tolerance  2.77777777778e-07 m
+accept    60 30
+expect    60.00535007 29.99746103
+
+tolerance  2.77777777778e-07 m
+accept    -7.025e-05 0.0041133
+expect    0 0
+
+tolerance  2.77777777778e-07 m
+accept    -60 -30
+expect    -60.00473241 -30.0042486
+
+tolerance  2.77777777778e-07 m
+accept    -119.9922412 -60.00081456
+expect    -120 -60
+
+tolerance  2.77777777778e-07 m
+accept    -150 -80
+expect    -150.01209192 -79.99612229
+
+tolerance  2.77777777778e-07 m
+accept    179.99786174 70.00666951
+expect    -180 70
+
+tolerance  2.77777777778e-07 m
+accept    -135 50
+expect    -135.00454845 49.99357566
+
+tolerance  2.77777777778e-07 m
+accept    -89.99487454 25.00457271
+expect    -90 25
+
+tolerance  2.77777777778e-07 m
+accept    0 0
+expect    7.032e-05 -0.00411349
+
+tolerance  2.77777777778e-07 m
+accept    143.92330599 -37.65282034
+expect    143.9279419 -37.6532236
+
+tolerance  2.77777777778e-07 m
+accept    135 -50
+expect    135.00641074 -49.99958243
+
+tolerance  2.77777777778e-07 m
+accept    179.99847886 -70.00362084
+expect    180 -70
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4289 +inv
+           +step +init=epsg:4326
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    150.01814371 79.99494639
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    120 60
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    60.00535007 29.99746103
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    0 0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -60.00473241 -30.0042486
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -120 -60
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -150.01209192 -79.99612229
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -180 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -135.00454845 49.99357566
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -90 25
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    7.032e-05 -0.00411349
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    143.9279419 -37.6532236
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    135.00641074 -49.99958243
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    180 -70
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5206.gie b/test/gigs/5206.gie
new file mode 100644
index 00000000..5f3d6eb6
--- /dev/null
+++ b/test/gigs/5206.gie
@@ -0,0 +1,540 @@
+--------------------------------------------------------------------------------
+
+Test 5206, NADCON transformation, v2.0_2011-06-28. Out of transform grid area error tests have been removed.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4267 +inv
+           +step +init=epsg:4269
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -89.5177272 29.9997978
+expect    -89.5177778 30.0
+
+tolerance  2.77777777778e-07 m
+accept    -90.5177778 29.2833333
+expect    -90.5178639 29.2835592
+
+tolerance  2.77777777778e-07 m
+accept    -91.5176758 28.2830864
+expect    -91.5177778 28.2833333
+
+tolerance  2.77777777778e-07 m
+accept    -92.5177778 27.2833333
+expect    -92.5178811 27.2836106
+
+tolerance  2.77777777778e-07 m
+accept    -93.5176731 26.2830225
+expect    -93.5177778 26.2833333
+
+tolerance  2.77777777778e-07 m
+accept    -94.5177778 25
+expect    -94.5178744 25.0003486
+
+tolerance  2.77777777778e-07 m
+accept    -142.9972522 70.0001631
+expect    -143 70
+
+tolerance  2.77777777778e-07 m
+accept    -142 70.0
+expect    -142.0026922 69.9998422
+
+tolerance  2.77777777778e-07 m
+accept    -141.9973078 70.0001578
+expect    -142 70
+
+tolerance  2.77777777778e-07 m
+accept    -140.9971981 70.0001481
+expect    -141 70
+
+tolerance  2.77777777778e-07 m
+accept    -140 70
+expect    -140.0027922 69.9998617
+
+tolerance  2.77777777778e-07 m
+accept    -138.9973075 70.0001297
+expect    -139 70
+
+tolerance  2.77777777778e-07 m
+accept    -138 70
+expect    -138.0026767 69.9998867
+
+tolerance  2.77777777778e-07 m
+accept    -134.9973733 70.000055
+expect    -135 70
+
+tolerance  2.77777777778e-07 m
+accept    -130 70
+expect    -130.0025347 70.0000511
+
+tolerance  2.77777777778e-07 m
+accept    -128.0009742 69.9999053
+expect    -128.0034722 70
+
+tolerance  2.77777777778e-07 m
+accept    -179 70
+expect    -179.0035064 69.9990142
+
+tolerance  2.77777777778e-07 m
+accept    -179.9964664 70.0010089
+expect    180 70
+
+tolerance  2.77777777778e-07 m
+accept    180 70
+expect    179.9964664 69.9989911
+
+tolerance  2.77777777778e-07 m
+accept    179 70
+expect    178.9964394 69.9989678
+
+tolerance  2.77777777778e-07 m
+accept    -111.9991714 49.9999556
+expect    -112 49.9999997
+
+tolerance  2.77777777778e-07 m
+accept    -112 49.9999997
+expect    -112.0008286 50.0000439
+
+tolerance  2.77777777778e-07 m
+accept    -111.9991214 49.0000033
+expect    -112 49
+
+tolerance  2.77777777778e-07 m
+accept    -112 48
+expect    -112.0008492 47.9999606
+
+tolerance  2.77777777778e-07 m
+accept    -111.9991678 47.0000569
+expect    -112 47
+
+tolerance  2.77777777778e-07 m
+accept    -112 47
+expect    -112.0008325 46.9999431
+
+tolerance  2.77777777778e-07 m
+accept    -111.9991756 46.0000733
+expect    -112 46
+
+tolerance  2.77777777778e-07 m
+accept    -112 45
+expect    -112.0008022 44.9999197
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 51
+expect    -130.5193953 50.9997114
+
+tolerance  2.77777777778e-07 m
+accept    -130.5160981 51.0002886
+expect    -130.5177467 51
+
+tolerance  2.77777777778e-07 m
+accept    -130.5161206 50.0002897
+expect    -130.5177467 49.9999997
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 49.9999997
+expect    -130.5193731 49.9997097
+
+tolerance  2.77777777778e-07 m
+accept    -130.5161458 49.0002717
+expect    -130.5177467 49
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 48.1166667
+expect    -130.5193258 48.1164106
+
+tolerance  2.77777777778e-07 m
+accept    -130.5161942 47.0002378
+expect    -130.5177467 47
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 47
+expect    -130.5192992 46.9997622
+
+tolerance  2.77777777778e-07 m
+accept    -130.5162172 46.0002222
+expect    -130.5177467 46
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 45
+expect    -130.5192539 44.9997925
+
+tolerance  2.77777777778e-07 m
+accept    -132.9984775 48.1169867
+expect    -133 48.1166667
+
+tolerance  2.77777777778e-07 m
+accept    -131.4555556 48.1166667
+expect    -131.4571578 48.1163964
+
+tolerance  2.77777777778e-07 m
+accept    -130.5161675 48.1169228
+expect    -130.5177467 48.1166667
+
+tolerance  2.77777777778e-07 m
+accept    -128.4555556 48.1166667
+expect    -128.4570433 48.1164319
+
+tolerance  2.77777777778e-07 m
+accept    -128.5444444 48.1166667
+expect    -128.5459361 48.1164311
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4269 +inv
+           +step +init=epsg:4267
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -89.5177778 30.0
+expect    -89.5177272 29.9997978
+
+tolerance  2.77777777778e-07 m
+accept    -90.5178639 29.2835592
+expect    -90.5177778 29.2833333
+
+tolerance  2.77777777778e-07 m
+accept    -91.5177778 28.2833333
+expect    -91.5176758 28.2830864
+
+tolerance  2.77777777778e-07 m
+accept    -92.5178811 27.2836106
+expect    -92.5177778 27.2833333
+
+tolerance  2.77777777778e-07 m
+accept    -93.5177778 26.2833333
+expect    -93.5176731 26.2830225
+
+tolerance  2.77777777778e-07 m
+accept    -94.5178744 25.0003486
+expect    -94.5177778 25
+
+tolerance  2.77777777778e-07 m
+accept    -143 70
+expect    -142.9972522 70.0001631
+
+tolerance  2.77777777778e-07 m
+accept    -142.0026922 69.9998422
+expect    -142 70.0
+
+tolerance  2.77777777778e-07 m
+accept    -142 70
+expect    -141.9973078 70.0001578
+
+tolerance  2.77777777778e-07 m
+accept    -141 70
+expect    -140.9971981 70.0001481
+
+tolerance  2.77777777778e-07 m
+accept    -140.0027922 69.9998617
+expect    -140 70
+
+tolerance  2.77777777778e-07 m
+accept    -139 70
+expect    -138.9973075 70.0001297
+
+tolerance  2.77777777778e-07 m
+accept    -138.0026767 69.9998867
+expect    -138 70
+
+tolerance  2.77777777778e-07 m
+accept    -135 70
+expect    -134.9973733 70.000055
+
+tolerance  2.77777777778e-07 m
+accept    -130.0025347 70.0000511
+expect    -130 70
+
+tolerance  2.77777777778e-07 m
+accept    -128.0034722 70
+expect    -128.0009742 69.9999053
+
+tolerance  2.77777777778e-07 m
+accept    -179.0035064 69.9990142
+expect    -179 70
+
+tolerance  2.77777777778e-07 m
+accept    180 70
+expect    -179.9964664 70.0010089
+
+tolerance  2.77777777778e-07 m
+accept    179.9964664 69.9989911
+expect    180 70
+
+tolerance  2.77777777778e-07 m
+accept    178.9964394 69.9989678
+expect    179 70
+
+tolerance  2.77777777778e-07 m
+accept    -112 49.9999997
+expect    -111.9991714 49.9999556
+
+tolerance  2.77777777778e-07 m
+accept    -112.0008286 50.0000439
+expect    -112 49.9999997
+
+tolerance  2.77777777778e-07 m
+accept    -112 49
+expect    -111.9991214 49.0000033
+
+tolerance  2.77777777778e-07 m
+accept    -112.0008492 47.9999606
+expect    -112 48
+
+tolerance  2.77777777778e-07 m
+accept    -112 47
+expect    -111.9991678 47.0000569
+
+tolerance  2.77777777778e-07 m
+accept    -112.0008325 46.9999431
+expect    -112 47
+
+tolerance  2.77777777778e-07 m
+accept    -112 46
+expect    -111.9991756 46.0000733
+
+tolerance  2.77777777778e-07 m
+accept    -112.0008022 44.9999197
+expect    -112 45
+
+tolerance  2.77777777778e-07 m
+accept    -130.5193953 50.9997114
+expect    -130.5177467 51
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 51
+expect    -130.5160981 51.0002886
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 49.9999997
+expect    -130.5161206 50.0002897
+
+tolerance  2.77777777778e-07 m
+accept    -130.5193731 49.9997097
+expect    -130.5177467 49.9999997
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 49
+expect    -130.5161458 49.0002717
+
+tolerance  2.77777777778e-07 m
+accept    -130.5193258 48.1164106
+expect    -130.5177467 48.1166667
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 47
+expect    -130.5161942 47.0002378
+
+tolerance  2.77777777778e-07 m
+accept    -130.5192992 46.9997622
+expect    -130.5177467 47
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 46
+expect    -130.5162172 46.0002222
+
+tolerance  2.77777777778e-07 m
+accept    -130.5192539 44.9997925
+expect    -130.5177467 45
+
+tolerance  2.77777777778e-07 m
+accept    -133 48.1166667
+expect    -132.9984775 48.1169867
+
+tolerance  2.77777777778e-07 m
+accept    -131.4571578 48.1163964
+expect    -131.4555556 48.1166667
+
+tolerance  2.77777777778e-07 m
+accept    -130.5177467 48.1166667
+expect    -130.5161675 48.1169228
+
+tolerance  2.77777777778e-07 m
+accept    -128.4570433 48.1164319
+expect    -128.4555556 48.1166667
+
+tolerance  2.77777777778e-07 m
+accept    -128.5459361 48.1164311
+expect    -128.5444444 48.1166667
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4267 +inv
+           +step +init=epsg:4269
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    -89.5177272 29.9997978
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -90.5177778 29.2833333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -91.5176758 28.2830864
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -92.5177778 27.2833333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -93.5176731 26.2830225
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -94.5177778 25
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -142.9972522 70.0001631
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -142 70.0
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -141.9973078 70.0001578
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -140.9971981 70.0001481
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -140 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.9973075 70.0001297
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -134.9973733 70.000055
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.0009742 69.9999053
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -179 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -179.9964664 70.0010089
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    180 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    179 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.9991714 49.9999556
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 49.9999997
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.9991214 49.0000033
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 48
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.9991678 47.0000569
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 47
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.9991756 46.0000733
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 45
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5177467 51
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5160981 51.0002886
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5161206 50.0002897
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5177467 49.9999997
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5161458 49.0002717
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5177467 48.1166667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5161942 47.0002378
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5177467 47
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5162172 46.0002222
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5177467 45
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -132.9984775 48.1169867
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -131.4555556 48.1166667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.5161675 48.1169228
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.4555556 48.1166667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.5444444 48.1166667
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5207.1.gie b/test/gigs/5207.1.gie
new file mode 100644
index 00000000..8384bf0e
--- /dev/null
+++ b/test/gigs/5207.1.gie
@@ -0,0 +1,252 @@
+--------------------------------------------------------------------------------
+
+Test 5207, NTv2 transformation, v2.0_2011-06-28. Out of transform grid area error tests have been removed.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4202 +inv
+           +step +init=epsg:4283
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -115 -10.05
+expect    -115.001251111 -10.0486372222
+
+tolerance  2.77777777778e-07 m
+accept    -114.998744167 -11.0013594444
+expect    -115 -11
+
+tolerance  2.77777777778e-07 m
+accept    -115 -12
+expect    -115.001261389 -11.9986441667
+
+tolerance  2.77777777778e-07 m
+accept    -138.04 -9
+expect    -138.041132778 -8.99854333333
+
+tolerance  2.77777777778e-07 m
+accept    -138.043867222 -9.00145666667
+expect    -138.045 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.05 -9
+expect    -138.051132778 -8.99854333333
+
+tolerance  2.77777777778e-07 m
+accept    -138.048867222 -9.00145666667
+expect    -138.05 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.053867222 -9.00145666667
+expect    -138.055 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.06 -9
+expect    -138.061132778 -8.99854333333
+
+tolerance  2.77777777778e-07 m
+accept    -138.038730833 -27.1264763889
+expect    -138.04 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -138.045 -27.125
+expect    -138.046268889 -27.1235236111
+
+tolerance  2.77777777778e-07 m
+accept    -138.05 -27.125
+expect    -138.051268889 -27.1235236111
+
+tolerance  2.77777777778e-07 m
+accept    -138.048731111 -27.1264763889
+expect    -138.05 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -138.055 -27.125
+expect    -138.056268889 -27.1235233333
+
+tolerance  2.77777777778e-07 m
+accept    -138.058731111 -27.1264766667
+expect    -138.06 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -136.847222222 -28.05
+expect    -136.848525278 -28.0485269444
+
+tolerance  2.77777777778e-07 m
+accept    -137.847222222 -28.05
+expect    -137.848505556 -28.0485311111
+
+tolerance  2.77777777778e-07 m
+accept    -138.847222222 -28.05
+expect    -138.8484925 -28.0485188889
+
+tolerance  2.77777777778e-07 m
+accept    -139.847222222 -28.05
+expect    -139.848475278 -28.0485072222
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4283 +inv
+           +step +init=epsg:4202
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -115.001251111 -10.0486372222
+expect    -115 -10.05
+
+tolerance  2.77777777778e-07 m
+accept    -115 -11
+expect    -114.998744167 -11.0013594444
+
+tolerance  2.77777777778e-07 m
+accept    -115.001261389 -11.9986441667
+expect    -115 -12
+
+tolerance  2.77777777778e-07 m
+accept    -138.041132778 -8.99854333333
+expect    -138.04 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.045 -9
+expect    -138.043867222 -9.00145666667
+
+tolerance  2.77777777778e-07 m
+accept    -138.051132778 -8.99854333333
+expect    -138.05 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.05 -9
+expect    -138.048867222 -9.00145666667
+
+tolerance  2.77777777778e-07 m
+accept    -138.055 -9
+expect    -138.053867222 -9.00145666667
+
+tolerance  2.77777777778e-07 m
+accept    -138.061132778 -8.99854333333
+expect    -138.06 -9
+
+tolerance  2.77777777778e-07 m
+accept    -138.04 -27.125
+expect    -138.038730833 -27.1264763889
+
+tolerance  2.77777777778e-07 m
+accept    -138.046268889 -27.1235236111
+expect    -138.045 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -138.051268889 -27.1235236111
+expect    -138.05 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -138.05 -27.125
+expect    -138.048731111 -27.1264763889
+
+tolerance  2.77777777778e-07 m
+accept    -138.056268889 -27.1235233333
+expect    -138.055 -27.125
+
+tolerance  2.77777777778e-07 m
+accept    -138.06 -27.125
+expect    -138.058731111 -27.1264766667
+
+tolerance  2.77777777778e-07 m
+accept    -136.848525278 -28.0485269444
+expect    -136.847222222 -28.05
+
+tolerance  2.77777777778e-07 m
+accept    -137.848505556 -28.0485311111
+expect    -137.847222222 -28.05
+
+tolerance  2.77777777778e-07 m
+accept    -138.8484925 -28.0485188889
+expect    -138.847222222 -28.05
+
+tolerance  2.77777777778e-07 m
+accept    -139.848475278 -28.0485072222
+expect    -139.847222222 -28.05
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4202 +inv
+           +step +init=epsg:4283
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    -115 -10.05
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -114.998744167 -11.0013594444
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -115 -12
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.04 -9
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.043867222 -9.00145666667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.05 -9
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.048867222 -9.00145666667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.053867222 -9.00145666667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.06 -9
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.038730833 -27.1264763889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.045 -27.125
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.05 -27.125
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.048731111 -27.1264763889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.055 -27.125
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.058731111 -27.1264766667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -136.847222222 -28.05
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -137.847222222 -28.05
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.847222222 -28.05
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -139.847222222 -28.05
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5207.2.gie b/test/gigs/5207.2.gie
new file mode 100644
index 00000000..bc76504a
--- /dev/null
+++ b/test/gigs/5207.2.gie
@@ -0,0 +1,456 @@
+--------------------------------------------------------------------------------
+
+Test 5206, NADCON transformation, v2.0_2011-06-28. Out of transform grid area error tests have been removed.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4267 +inv
+           +step +init=epsg:4269
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -142 70
+expect    -142.002804722 69.9998069444
+
+tolerance  2.77777777778e-07 m
+accept    -141.997195278 70.0001930556
+expect    -142 70
+
+tolerance  2.77777777778e-07 m
+accept    -140.997219722 70.0001791667
+expect    -141 70
+
+tolerance  2.77777777778e-07 m
+accept    -140 70
+expect    -140.002795278 69.9998280556
+
+tolerance  2.77777777778e-07 m
+accept    -138.997199444 70.0001608333
+expect    -139 70
+
+tolerance  2.77777777778e-07 m
+accept    -138 70
+expect    -138.002957222 69.9998755556
+
+tolerance  2.77777777778e-07 m
+accept    -134.997081944 70.0000463889
+expect    -135 70
+
+tolerance  2.77777777778e-07 m
+accept    -130 70
+expect    -130.002737222 70.0000533333
+
+tolerance  2.77777777778e-07 m
+accept    -128.000734722 69.9998663889
+expect    -128.003472222 70
+
+tolerance  2.77777777778e-07 m
+accept    -128 70
+expect    -128.002737778 70.0001336111
+
+tolerance  2.77777777778e-07 m
+accept    -125.997388333 69.9997780556
+expect    -126 70
+
+tolerance  2.77777777778e-07 m
+accept    -88.005575 70
+expect    -88.0056825 70.0006094444
+
+tolerance  2.77777777778e-07 m
+accept    -88 70
+expect    -88.0001072222 70.0006091667
+
+tolerance  2.77777777778e-07 m
+accept    -87.9998933333 69.9993908333
+expect    -88 70
+
+tolerance  2.77777777778e-07 m
+accept    -87.6610917 70
+expect    -87.6611716667 70.0006033333
+
+tolerance  2.77777777778e-07 m
+accept    -112.165693333 51.0169555556
+expect    -112.166607778 51.0170094444
+
+tolerance  2.77777777778e-07 m
+accept    -111.999093889 50.9999491667
+expect    -112 51
+
+tolerance  2.77777777778e-07 m
+accept    -111.999095278 49.9999597222
+expect    -112 49.9999997222
+
+tolerance  2.77777777778e-07 m
+accept    -112 49.9999997222
+expect    -112.000904639 50.0000396667
+
+tolerance  2.77777777778e-07 m
+accept    -111.9991175 49.0000063889
+expect    -112 49
+
+tolerance  2.77777777778e-07 m
+accept    -112 48
+expect    -112.0008525 47.9999888889
+
+tolerance  2.77777777778e-07 m
+accept    -111.999174722 47.0000097222
+expect    -112 47
+
+tolerance  2.77777777778e-07 m
+accept    -112 47
+expect    -112.000825278 46.9999902778
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 51
+expect    -130.519401944 50.9997713889
+
+tolerance  2.77777777778e-07 m
+accept    -130.516091667 51.0002286111
+expect    -130.517746667 51
+
+tolerance  2.77777777778e-07 m
+accept    -130.516041667 50.0002461111
+expect    -130.517746667 49.9999997222
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 49.9999997222
+expect    -130.519451667 49.9997533333
+
+tolerance  2.77777777778e-07 m
+accept    -130.516067222 49.0002825
+expect    -130.517746667 49
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 48
+expect    -130.519391111 47.9996794444
+
+tolerance  2.77777777778e-07 m
+accept    -130.516146944 47.0003611111
+expect    -130.517746667 47
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 47
+expect    -130.519346389 46.9996386111
+
+tolerance  2.77777777778e-07 m
+accept    -132.998205278 48.1170263889
+expect    -133 48.1166666667
+
+tolerance  2.77777777778e-07 m
+accept    -131.455555556 48.1166666667
+expect    -131.457260278 48.1163330556
+
+tolerance  2.77777777778e-07 m
+accept    -130.516098056 48.1169827778
+expect    -130.517746667 48.1166666667
+
+tolerance  2.77777777778e-07 m
+accept    -128.455555556 48.1166666667
+expect    -128.457086944 48.1163927778
+
+tolerance  2.77777777778e-07 m
+accept    -128.5444 48.1167066
+expect    -128.545936111 48.1164311111
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4269 +inv
+           +step +init=epsg:4267
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    -142.002804722 69.9998069444
+expect    -142 70
+
+tolerance  2.77777777778e-07 m
+accept    -142 70
+expect    -141.997195278 70.0001930556
+
+tolerance  2.77777777778e-07 m
+accept    -141 70
+expect    -140.997219722 70.0001791667
+
+tolerance  2.77777777778e-07 m
+accept    -140.002795278 69.9998280556
+expect    -140 70
+
+tolerance  2.77777777778e-07 m
+accept    -139 70
+expect    -138.997199444 70.0001608333
+
+tolerance  2.77777777778e-07 m
+accept    -138.002957222 69.9998755556
+expect    -138 70
+
+tolerance  2.77777777778e-07 m
+accept    -135 70
+expect    -134.997081944 70.0000463889
+
+tolerance  2.77777777778e-07 m
+accept    -130.002737222 70.0000533333
+expect    -130 70
+
+tolerance  2.77777777778e-07 m
+accept    -128.003472222 70
+expect    -128.000734722 69.9998663889
+
+tolerance  2.77777777778e-07 m
+accept    -128.002737778 70.0001336111
+expect    -128 70
+
+tolerance  2.77777777778e-07 m
+accept    -126 70
+expect    -125.997388333 69.9997780556
+
+tolerance  2.77777777778e-07 m
+accept    -88.0056825 70.0006094444
+expect    -88.005575 70
+
+tolerance  2.77777777778e-07 m
+accept    -88.0001072222 70.0006091667
+expect    -88 70
+
+tolerance  2.77777777778e-07 m
+accept    -88 70
+expect    -87.9998933333 69.9993908333
+
+tolerance  2.77777777778e-07 m
+accept    -87.6611716667 70.0006033333
+expect    -87.6610917 70
+
+tolerance  2.77777777778e-07 m
+accept    -112.166607778 51.0170094444
+expect    -112.165693333 51.0169555556
+
+tolerance  2.77777777778e-07 m
+accept    -112 51
+expect    -111.999093889 50.9999491667
+
+tolerance  2.77777777778e-07 m
+accept    -112 49.9999997222
+expect    -111.999095278 49.9999597222
+
+tolerance  2.77777777778e-07 m
+accept    -112.000904639 50.0000396667
+expect    -112 49.9999997222
+
+tolerance  2.77777777778e-07 m
+accept    -112 49
+expect    -111.9991175 49.0000063889
+
+tolerance  2.77777777778e-07 m
+accept    -112.0008525 47.9999888889
+expect    -112 48
+
+tolerance  2.77777777778e-07 m
+accept    -112 47
+expect    -111.999174722 47.0000097222
+
+tolerance  2.77777777778e-07 m
+accept    -112.000825278 46.9999902778
+expect    -112 47
+
+tolerance  2.77777777778e-07 m
+accept    -130.519401944 50.9997713889
+expect    -130.517746667 51
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 51
+expect    -130.516091667 51.0002286111
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 49.9999997222
+expect    -130.516041667 50.0002461111
+
+tolerance  2.77777777778e-07 m
+accept    -130.519451667 49.9997533333
+expect    -130.517746667 49.9999997222
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 49
+expect    -130.516067222 49.0002825
+
+tolerance  2.77777777778e-07 m
+accept    -130.519391111 47.9996794444
+expect    -130.517746667 48
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 47
+expect    -130.516146944 47.0003611111
+
+tolerance  2.77777777778e-07 m
+accept    -130.519346389 46.9996386111
+expect    -130.517746667 47
+
+tolerance  2.77777777778e-07 m
+accept    -133 48.1166666667
+expect    -132.998205278 48.1170263889
+
+tolerance  2.77777777778e-07 m
+accept    -131.457260278 48.1163330556
+expect    -131.455555556 48.1166666667
+
+tolerance  2.77777777778e-07 m
+accept    -130.517746667 48.1166666667
+expect    -130.516098056 48.1169827778
+
+tolerance  2.77777777778e-07 m
+accept    -128.457086944 48.1163927778
+expect    -128.455555556 48.1166666667
+
+tolerance  2.77777777778e-07 m
+accept    -128.545936111 48.1164311111
+expect    -128.5444 48.1167066
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4267 +inv
+           +step +init=epsg:4269
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    -142 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -141.997195278 70.0001930556
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -140.997219722 70.0001791667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -140 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138.997199444 70.0001608333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -138 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -134.997081944 70.0000463889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.000734722 69.9998663889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -125.997388333 69.9997780556
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -88.005575 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -88 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -87.9998933333 69.9993908333
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -87.6610917 70
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112.165693333 51.0169555556
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.999093889 50.9999491667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.999095278 49.9999597222
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 49.9999997222
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.9991175 49.0000063889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 48
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -111.999174722 47.0000097222
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -112 47
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.517746667 51
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.516091667 51.0002286111
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.516041667 50.0002461111
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.517746667 49.9999997222
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.516067222 49.0002825
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.517746667 48
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.516146944 47.0003611111
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.517746667 47
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -132.998205278 48.1170263889
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -131.455555556 48.1166666667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -130.516098056 48.1169827778
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.455555556 48.1166666667
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    -128.5444 48.1167066
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/5208.gie b/test/gigs/5208.gie
new file mode 100644
index 00000000..5d94474a
--- /dev/null
+++ b/test/gigs/5208.gie
@@ -0,0 +1,192 @@
+--------------------------------------------------------------------------------
+
+Test 5208, Longitude Rotation, v2.0_2011-06-28.
+
+--------------------------------------------------------------------------------
+
+<gie>
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4275 +inv
+           +step +init=epsg:4807
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    5 58
+expect    2.66277083 58
+
+tolerance  2.77777777778e-07 m
+accept    5 56
+expect    2.66277083 56
+
+tolerance  2.77777777778e-07 m
+accept    5 55
+expect    2.66277083 55
+
+tolerance  2.77777777778e-07 m
+accept    5 53
+expect    2.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    4 51
+expect    1.66277083 51
+
+tolerance  2.77777777778e-07 m
+accept    4 49
+expect    1.66277083 49
+
+tolerance  2.77777777778e-07 m
+accept    2.33722917 46.8
+expect    0 46.8
+
+tolerance  2.77777777778e-07 m
+accept    3 53
+expect    0.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    4 53
+expect    1.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    6 53
+expect    3.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    7 53
+expect    4.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    9 53
+expect    6.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    10 53
+expect    7.66277083 53
+
+tolerance  2.77777777778e-07 m
+accept    11 53
+expect    8.66277083 53
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4807 +inv
+           +step +init=epsg:4275
+--------------------------------------------------------------------------------
+tolerance  2.77777777778e-07 m
+accept    2.66277083 58
+expect    5 58
+
+tolerance  2.77777777778e-07 m
+accept    2.66277083 56
+expect    5 56
+
+tolerance  2.77777777778e-07 m
+accept    2.66277083 55
+expect    5 55
+
+tolerance  2.77777777778e-07 m
+accept    2.66277083 53
+expect    5 53
+
+tolerance  2.77777777778e-07 m
+accept    1.66277083 51
+expect    4 51
+
+tolerance  2.77777777778e-07 m
+accept    1.66277083 49
+expect    4 49
+
+tolerance  2.77777777778e-07 m
+accept    0 46.8
+expect    2.33722917 46.8
+
+tolerance  2.77777777778e-07 m
+accept    0.66277083 53
+expect    3 53
+
+tolerance  2.77777777778e-07 m
+accept    1.66277083 53
+expect    4 53
+
+tolerance  2.77777777778e-07 m
+accept    3.66277083 53
+expect    6 53
+
+tolerance  2.77777777778e-07 m
+accept    4.66277083 53
+expect    7 53
+
+tolerance  2.77777777778e-07 m
+accept    6.66277083 53
+expect    9 53
+
+tolerance  2.77777777778e-07 m
+accept    7.66277083 53
+expect    10 53
+
+tolerance  2.77777777778e-07 m
+accept    8.66277083 53
+expect    11 53
+
+--------------------------------------------------------------------------------
+operation  +proj=pipeline
+           +step +init=epsg:4275 +inv
+           +step +init=epsg:4807
+--------------------------------------------------------------------------------
+tolerance  5.55555555556e-08 m
+accept    5 58
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    5 56
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    5 55
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    5 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    4 51
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    4 49
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    2.33722917 46.8
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    3 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    4 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    6 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    7 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    9 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    10 53
+roundtrip 1000
+
+tolerance  5.55555555556e-08 m
+accept    11 53
+roundtrip 1000
+
+</gie>
diff --git a/test/gigs/convert_to_gie.py b/test/gigs/convert_to_gie.py
index 2b80aaa3..ba04b03d 100644
--- a/test/gigs/convert_to_gie.py
+++ b/test/gigs/convert_to_gie.py
@@ -1,6 +1,34 @@
 import sys
 import json
 
+def write_coords(f, coords, testtype, test):
+    '''testtype can be either ('fwd', 'inv', 'roundtrip')'''
+
+    for coord in coords:
+        if len(coord[0]) == 3:
+            cstring = '{} {} {}'
+        else:
+            cstring = '{} {}'
+
+        f.write('tolerance  {tol} m\n'.format(tol=test['tolerances'][tolerance_index]))
+        accept = 'accept    {s}\n'.format(s=cstring)
+        expect = 'expect    {s}\n'.format(s=cstring)
+
+        if testtype == 'fwd':
+            f.write(accept.format(*coord[0]))
+            f.write(expect.format(*coord[1]))
+
+        if testtype == 'inv':
+            f.write(accept.format(*coord[1]))
+            f.write(expect.format(*coord[0]))
+
+        if testtype == 'roundtrip':
+            f.write(accept.format(*coord[0]))
+            f.write('roundtrip {n}\n'.format(n=test['times']))
+
+        f.write('\n')
+
+
 
 with open(sys.argv[1]) as f:
     data = json.load(f)
@@ -26,16 +54,13 @@ with open(filename, 'w') as f:
         f.write('           +step {src} +inv\n'.format(src=crss[0]))
         f.write('           +step {dst}\n'.format(dst=crss[1]))
         f.write('-'*80 + '\n')
-
         if test['type'] == 'conversion':
             write_coords(f, coords, 'fwd', test)
-
             f.write('-'*80 + '\n')
             f.write('operation  +proj=pipeline\n')
             f.write('           +step {src} +inv\n'.format(src=crss[1]))
             f.write('           +step {dst}\n'.format(dst=crss[0]))
             f.write('-'*80 + '\n')
-
             write_coords(f, coords, 'inv', test)
 
         if test['type'] == 'roundtrip':