Hi I would like to understand why do I have different behaviour recognizing a WKT between GDAL 3.9.2 and 3.11.1, both using PROJ 9.5.0 (using C++)
There is a clear mistake in the WKT bellow: EPSG:102641 . It should be ESRI. But the source of the data was wrong, and we worked with that for a long time. PROJCS["NAD_1983_StatePlane_California_I_FIPS_0401_Feet",GEOGCS["GCS_North_American_1983",DATUM["North_American_Datum_1983", SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Lambert_Conformal_Conic_2SP"], PARAMETER["False_Easting",6561666.666666666],PARAMETER["False_Northing",1640416.666666667],PARAMETER["Central_Meridian",-122], PARAMETER["Standard_Parallel_1",40],PARAMETER["Standard_Parallel_2",41.66666666666666],PARAMETER["Latitude_Of_Origin",39.33333333333334], UNIT["Foot_US",0.30480060960121924],AUTHORITY["EPSG","102641"]] and yes, ESRI version of WKT does not have AUTHORITY. Again, the data source is what it is. My failing test is because OGRCreateCoordinateTransformation called with EPSG:4326 and calStatePlaneCS (created with SetFromUserInput) is failing. The reason I found is in GetTextRepresentation in ogrct.cpp. There it checks (if I understood correctly) if EPSG:102641 and the OGRSpatialReference constructed from the string are equivalent. In GDAL 3.9.2 the function IsSame is returning false, and GetTextRepresentation is trying later with PROJJSON In GDAL 3.11.1 the function IsSame returns true, and it is using EPSG:102641, that fails later in OGRProjCT::Initialize (more in particular in auto targetCRS = proj_create(ctx, pszTargetSRS);) See that I am not changing the version of PROJ: 9.5.0 I have been looking for any change in GDAL code that would explain why the wrong "WKT from California" behaves differently, but I couldn't find anything. The changes in the code in ogrct.cpp and ogrspatialreference.cpp that I think are involved are years old (just a thread safe lock changed). But obviously I am missing something. Could you help me? Thanks. Javier
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