Merge pull request #3108 from rouault/fix_3095

createOperations(): fix issue in transformation northing,easting projected CRS -> +proj=longlat +lon_wrap (fixes #3095)

2 files changed, 28 insertions, 1 deletions

diff --git a/src/iso19111/crs.cpp b/src/iso19111/crs.cpp
index 881aec0b..e4b8094f 100644
--- a/src/iso19111/crs.cpp
+++ b/src/iso19111/crs.cpp
@@ -4404,7 +4404,8 @@ void ProjectedCRS::addUnitConvertAndAxisSwap(io::PROJStringFormatter *formatter,
         formatter->addParam("units", "m");
     }
 
-    if (!axisSpecFound && !formatter->getCRSExport()) {
+    if (!axisSpecFound &&
+        (!formatter->getCRSExport() || formatter->getLegacyCRSToCRSContext())) {
         const auto &dir0 = axisList[0]->direction();
         const auto &dir1 = axisList[1]->direction();
         if (!(&dir0 == &cs::AxisDirection::EAST &&
diff --git a/test/unit/test_operationfactory.cpp b/test/unit/test_operationfactory.cpp
index 89c4e7c4..0c3ecae4 100644
--- a/test/unit/test_operationfactory.cpp
+++ b/test/unit/test_operationfactory.cpp
@@ -6569,6 +6569,32 @@ TEST(operation, createOperation_on_crs_with_bound_crs_and_wktext) {
 
 // ---------------------------------------------------------------------------
 
+TEST(operation,
+     createOperation_fallback_to_proj4_strings_with_axis_inverted_projCRS) {
+    auto objSrc =
+        createFromUserInput("EPSG:2193", DatabaseContext::create(), false);
+    auto src = nn_dynamic_pointer_cast<CRS>(objSrc);
+    ASSERT_TRUE(src != nullptr);
+
+    auto objDest = PROJStringParser().createFromPROJString(
+        "+proj=longlat +ellps=WGS84 +lon_wrap=180 +type=crs");
+    auto dest = nn_dynamic_pointer_cast<GeographicCRS>(objDest);
+    ASSERT_TRUE(dest != nullptr);
+
+    auto op = CoordinateOperationFactory::create()->createOperation(
+        NN_CHECK_ASSERT(src), NN_CHECK_ASSERT(dest));
+    ASSERT_TRUE(op != nullptr);
+    EXPECT_EQ(op->exportToPROJString(PROJStringFormatter::create().get()),
+              "+proj=pipeline "
+              "+step +proj=axisswap +order=2,1 "
+              "+step +inv +proj=tmerc +lat_0=0 +lon_0=173 +k=0.9996 "
+              "+x_0=1600000 +y_0=10000000 +ellps=GRS80 "
+              "+step +proj=longlat +ellps=WGS84 +lon_wrap=180 "
+              "+step +proj=unitconvert +xy_in=rad +xy_out=deg");
+}
+
+// ---------------------------------------------------------------------------
+
 TEST(operation, compoundCRS_to_proj_string_with_non_metre_height) {
     auto objSrc =
         createFromUserInput("EPSG:6318+5703", DatabaseContext::create(), false);