Map EPSG method 'Vertical Offset by Grid Interpolation (asc)' to +pro…

…j=vgridshift Fixes #4342 Note that currently none of the .asc grids are in PROJ-data. Most of the ones registered in the EPSG dataset are for EVRF2019 heights and are managed by Euref. My past attempts of getting an open data license for the grid from Euref have not been successful.
OSGeo · Dec 9, 2024 · cf2ee49 · cf2ee49
1 parent a33372b
commit cf2ee49
Show file tree

Hide file tree

Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/src/iso19111/operation/parammappings.cpp b/src/iso19111/operation/parammappings.cpp
@@ -1038,6 +1038,12 @@ const struct MethodNameCode methodNameCodesList[] = {
     METHOD_NAME_CODE(NADCON5_3D),
     METHOD_NAME_CODE(VERTCON),
     METHOD_NAME_CODE(GEOCENTRIC_TRANSLATION_BY_GRID_INTERPOLATION_IGN),
+    METHOD_NAME_CODE(VERTICALGRID_NZLVD),
+    METHOD_NAME_CODE(VERTICALGRID_BEV_AT),
+    METHOD_NAME_CODE(VERTICALGRID_GTX),
+    METHOD_NAME_CODE(VERTICALGRID_ASC),
+    METHOD_NAME_CODE(VERTICALGRID_GTG),
+    METHOD_NAME_CODE(VERTICALGRID_PL_TXT),
     // PointMotionOperation
     METHOD_NAME_CODE(POINT_MOTION_BY_GRID_CANADA_NTV2_VEL),
 };

diff --git a/src/iso19111/operation/singleoperation.cpp b/src/iso19111/operation/singleoperation.cpp
@@ -2159,7 +2159,6 @@ bool Transformation::isGeographic3DToGravityRelatedHeight(
         "1126", // Vertical change by geoid grid difference (NRCan)
         "1127", // Geographic3D to Depth (gtg)
         "1128", // Geog3D to Geog2D+Depth (gtg)
-        "1129", // Vertical Offset by Grid Interpolation (gtg)
         "1135", // Geog3D to Geog2D+GravityRelatedHeight (NGS bin)
         "9661", // Geographic3D to GravityRelatedHeight (EGM)
         "9662", // Geographic3D to GravityRelatedHeight (Ausgeoid98)
@@ -2312,6 +2311,7 @@ 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_ASC ||
            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
@@ -681,6 +681,10 @@
 #define EPSG_NAME_METHOD_VERTICALGRID_GTX                                      \
     "Vertical Offset by Grid Interpolation (gtx)"
 
+#define EPSG_CODE_METHOD_VERTICALGRID_ASC 1085
+#define EPSG_NAME_METHOD_VERTICALGRID_ASC                                      \
+    "Vertical Offset by Grid Interpolation (asc)"
+
 #define EPSG_CODE_METHOD_VERTICALGRID_GTG 1129
 #define EPSG_NAME_METHOD_VERTICALGRID_GTG                                      \
     "Vertical Offset by Grid Interpolation (gtg)"