From 5d173d8de9a6f3281abf5d67be0810b34a2ffa69 Mon Sep 17 00:00:00 2001
From: Javier Jimenez Shaw <j1@jimenezshaw.com>
Date: Thu, 1 Aug 2024 15:35:52 +0200
Subject: [PATCH] process properly EPSG_CODE_METHOD_VERTICALGRID_GTG with code
 1129

---
 src/iso19111/operation/singleoperation.cpp | 1 +
 src/proj_constants.h                       | 4 ++++
 test/unit/test_factory.cpp                 | 9 +++++++++
 3 files changed, 14 insertions(+)

diff --git a/src/iso19111/operation/singleoperation.cpp b/src/iso19111/operation/singleoperation.cpp
index 4778966c79..fd075ee709 100644
--- a/src/iso19111/operation/singleoperation.cpp
+++ b/src/iso19111/operation/singleoperation.cpp
@@ -2269,6 +2269,7 @@ static bool isRegularVerticalGridMethod(int methodEPSGCode,
     return methodEPSGCode == EPSG_CODE_METHOD_VERTICALGRID_NZLVD ||
            methodEPSGCode == EPSG_CODE_METHOD_VERTICALGRID_BEV_AT ||
            methodEPSGCode == EPSG_CODE_METHOD_VERTICALGRID_GTX ||
+           methodEPSGCode == EPSG_CODE_METHOD_VERTICALGRID_GTG ||
            methodEPSGCode == EPSG_CODE_METHOD_VERTICALGRID_PL_TXT;
 }
 
diff --git a/src/proj_constants.h b/src/proj_constants.h
index 3092acda36..7ed53817fc 100644
--- a/src/proj_constants.h
+++ b/src/proj_constants.h
@@ -656,6 +656,10 @@
 #define EPSG_NAME_METHOD_VERTICALGRID_GTX                                      \
     "Vertical Offset by Grid Interpolation (gtx)"
 
+#define EPSG_CODE_METHOD_VERTICALGRID_GTG 1129
+#define EPSG_NAME_METHOD_VERTICALGRID_GTG                                      \
+    "Vertical Offset by Grid Interpolation (gtg)"
+
 #define EPSG_CODE_METHOD_VERTICALGRID_PL_TXT 1101
 #define EPSG_NAME_METHOD_VERTICALGRID_PL_TXT                                   \
     "Vertical Offset by Grid Interpolation (PL txt)"
diff --git a/test/unit/test_factory.cpp b/test/unit/test_factory.cpp
index 5f3b4138d7..da6b10a6c6 100644
--- a/test/unit/test_factory.cpp
+++ b/test/unit/test_factory.cpp
@@ -1208,6 +1208,15 @@ TEST(factory, AuthorityFactory_affine_parametric_transform) {
 
 // ---------------------------------------------------------------------------
 
+TEST(factory, AuthorityFactory_10566_issue_4212) {
+    auto factory = AuthorityFactory::create(DatabaseContext::create(), "EPSG");
+    auto op = factory->createCoordinateOperation("10566", true);
+    EXPECT_EQ(op->exportToPROJString(PROJStringFormatter::create().get()),
+              "+proj=vgridshift +grids=dk_sdfi_gllmsl_2022.tif +multiplier=1");
+}
+
+// ---------------------------------------------------------------------------
+
 TEST(factory,
      AuthorityFactory_createCoordinateOperation_concatenated_operation) {
     auto factory = AuthorityFactory::create(DatabaseContext::create(), "EPSG");