Hi, I call OSRImportFromProj4 with "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +towgs84=0,0,0,0,0,0,0 +wktext +no_defs"
and with the returned handle i get the major and minor axis ( OSRGetSemiMajor/OSRGetSemiMinor). I would expect the both axis to be equal, but they aren't. Instead i'm getting the following result: semi_major_axis=6378137 semi_minor_axis=6356752.314 Build on Ubuntu 20.10 (groovy; amd64) with libgdal-dev, version 3.1.3+dfsg-1ubuntu2) and libproj-dev:amd64 with version 7.1.0-1 The full example application code: https://pastebin.com/xf8QpVhM Regards, Andreas
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