Add horizontal grid for Slovakia - JTSK03 to JTSK (EPSG:8364) (#17)

6 files changed, 34 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7387055..950f837 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,6 +38,7 @@ set(CPACK_SOURCE_INSTALLED_DIRECTORIES
     "${CMAKE_CURRENT_SOURCE_DIR}/nz_linz/" "."
     "${CMAKE_CURRENT_SOURCE_DIR}/pt_dgt/" "."
     "${CMAKE_CURRENT_SOURCE_DIR}/se_lantmateriet/" "."
+    "${CMAKE_CURRENT_SOURCE_DIR}/sk_gku/" "."
     "${CMAKE_CURRENT_SOURCE_DIR}/uk_os/" "."
     "${CMAKE_CURRENT_SOURCE_DIR}/us_nga/" "."
     "${CMAKE_CURRENT_SOURCE_DIR}/us_noaa/" "."
diff --git a/copyright_and_licenses.csv b/copyright_and_licenses.csv
index 6c5106d..dafd937 100644
--- a/copyright_and_licenses.csv
+++ b/copyright_and_licenses.csv
@@ -169,6 +169,7 @@ pt_dgt_README.txt,Disclaimed,Public domain
 README.DATA,Disclaimed,Public domain
 se_lantmateriet_README.txt,Disclaimed,Public domain
 se_lantmateriet_SWEN17_RH2000.tif,Lantmäteriet,CC0-1.0
+sk_gku_JTSK03_to_JTSK.tif,Copyright 2013 - GKU Slovakia,CC-BY-4.0
 uk_os_OSGM15_Belfast.tif,Ordnance Survey UK,BSD-2-Clause
 uk_os_OSGM15_Malin.tif,Ordnance Survey UK,BSD-2-Clause
 uk_os_OSTN15_NTv2_OSGBtoETRS.tif,Ordnance Survey UK,BSD-2-Clause
diff --git a/sk_gku/.github/README.md b/sk_gku/.github/README.md
new file mode 120000
index 0000000..86629c0
--- /dev/null
+++ b/sk_gku/.github/README.md
@@ -0,0 +1 @@
+../sk_gku_README.txt
\ No newline at end of file
diff --git a/sk_gku/sk_gku_JTSK03_to_JTSK.tif b/sk_gku/sk_gku_JTSK03_to_JTSK.tif
new file mode 100644
index 0000000..50ebaf6
--- /dev/null
+++ b/sk_gku/sk_gku_JTSK03_to_JTSK.tif
diff --git a/sk_gku/sk_gku_README.txt b/sk_gku/sk_gku_README.txt
new file mode 100644
index 0000000..10bc2a8
--- /dev/null
+++ b/sk_gku/sk_gku_README.txt
@@ -0,0 +1,29 @@
+# sk_gku_README.txt
+
+The files in this section result from the conversion of datasets originating
+from [GKU](https://www.geoportal.sk/en/) (Geodetic and Cartographic Institute).
+
+## Included grids
+
+### Slovakia: JTSK03 -> JTSK
+
+*Source*: [GKU](https://www.geoportal.sk/en/geodeticke-zaklady/download/)
+*Format*: GeoTIFF converted from NTv2  
+*License*: [Creative Commons Attribution 4.0](http://creativecommons.org/licenses/by/4.0/)
+
+This is digital datum shift model for horizontal coordinates transformation between JTSK03 and JTSK 
+reference frames of S-JTSK coordinate refernce system in the territory of Slovakia.
+Transformation shift model involves the vectors of coordinate differences defined
+in the plane JTSK03 on 684 identical points. It is the same set of identical points, which
+has been used for the computation of the 7 Helmert transformation parameters of the global transformation key.
+The computed coordinate differences characterize systematic non-homogeneity of the JTSK frame, but
+do not aptly describe detailed non-homogeneity of lesser localities on cm level.
+For purposes of the unambiguous definition of transformation relation between the JTSK03 and JTSK
+frames it was necessary to express coordinate differences in the form of a regular grid and to define
+the interpolation method. For this purpose the coordinate differences between JTSK03 and JTSK
+in the shape of ellipsoidal coordinates on Bessell1841 ellipsoid for individual axes have been
+interpolated by the Surfer software kriging method into a regular grid with a step 0.0168 deg (latitude) x 0.025 deg (longitude).
+
+For correct usage of those shift models always check your outputs with transformation service: https://zbgis.skgeodesy.sk/rts/en/Transform 
+
+* sk_gku_JTSK03_to_JTSK.tif
diff --git a/travis/expected_main.lst b/travis/expected_main.lst
index 5a39017..0aa0468 100644
--- a/travis/expected_main.lst
+++ b/travis/expected_main.lst
@@ -169,6 +169,8 @@ pt_dgt_README.txt
 README.DATA
 se_lantmateriet_README.txt
 se_lantmateriet_SWEN17_RH2000.tif
+sk_gku_JTSK03_to_JTSK.tif
+sk_gku_README.txt
 uk_os_OSGM15_Belfast.tif
 uk_os_OSGM15_Malin.tif
 uk_os_OSTN15_NTv2_OSGBtoETRS.tif