I'm trying to obtain the *same* transformations from different libproj versions (5.2.0 and 7.2.1) by passing the *same* proj4 strings to the transformation, but I'm instead getting different results.
In order to more easily test this I'm a small python script using pyproj: http://strk.kbt.io/tmp/transform_test.py The script projects coordinates 0,0 from EPSG:32040 to EPSG:3857, using the proj4 string found in PostGIS 3.1.4 spatial_ref_sys for those SRIDs. On a machine (pyproj-3.2.1 using libproj-ce980207.so.22.1.1) I'm getting these coordinates in output: (-11708740.522541871, 3209723.515103944) On another machine (pyproj-2.6.1 using libproj.so.19) I'm getting these coordinates: (-11708734.486616733, 3209717.223316072) Can you think of a reason why I'd get different numbers ? Would it be a regression for the libproj-ce980207.so.22.1.1 version to return different numbers ? Please keep me in Cc in case of replies as I don't think I'm receiving emails sent to this list. --strk; Libre GIS consultant/developer https://strk.kbt.io/services.html _______________________________________________ PROJ mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/proj
