Le 28/03/2024 à 17:47, Simon Eves a écrit :
Seems like whether a PROJ warning is reported as an error or warning depends on whether it has "Default it to" in the text. This one does not, and is returned as an error. The logic here is unclear to me.
yes, there was indeed a discrepancy between the documented behavior of the PROJ C API and what the PROJ C++ API offered to fulfill it. That should be solved by https://github.com/OSGeo/PROJ/pull/4108
However as noted in the updated documentation, the distinction between warnings and errors is probably not that much relevant, and the mapping to the OSRValidate() API that dates backs to well before the complete revanp done in PROJ 6+GDAL 3 is even more arbitrary. The bottom line is that if OSRValidate() returns a non-OGRERR_NONE code, there's something that is non nominal, and human expertise is required to assess if it can be ignored or not.
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