Dear devs, why is og2ogr using a grid shift file explicitely specified in the proj4 string in the s_srs parameter and not when the same proj4 string is in the system-wide proj4/epsg file?
This example gives correct projected results: ogr2ogr -f 'ESRI Shapefile' target.shp -s_srs "+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel +nadgrids=@BWTA2017.gsb,BETA2007.gsb +units=m +wktext" -t_srs "EPSG:25832" source.shp The proj4/epsg contains exactly the same definition for EPSG:31467, but when used like this: ogr2ogr -f 'ESRI Shapefile' target.shp -s_srs "EPSG:31467" -t_srs "EPSG:25832" source.shp the transformation is using the towgs84 parameters defined in datum_shifts.csv... Is this the intended behaviour? Thanks, Michael -- ----------------------------------------------------------- Michael Schulz
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