Hi Jürgen, thanks for your research.
Am Sa, 20.01.2018, 18:05 schrieb Jürgen E. Fischer: > GDAL does detect the correct EPSG from prj it wrote itself. Yes, this is true for GDAL, but as soon as the QPJ is missing, QGIS switches back to 3044. I figured out that adding AUTHORITY["EPSG","25832"] to the PRJ makes QGIS parse it correctly. I'll write a small tool for my co-workers. Or maybe even a QGIS plugin, which forces 25832 whenever 3044 is being detected. No good work-around :( What about a feature to QGIS to force a CRS, if another one has been detected? :) > Apparently from the different name of the projection, because the > rest of the prj is the same. There is no information about the > different axis order in the prj (ie. the only > actual difference between EPSG:3044 and EPSG:25832). Yeah, see blow. Axis order will matter with new Proj4. Many things will change/break here in future. Also scripts might fail because of different CRS. > How do your .prj actually look like? I don't have ArcGIS PRJs at the moment. I can add them tomorrow. I've completely switched from ArcGIS to QGIS some years ago. Take this example from Geodatenzentrum: http://www.geodatenzentrum.de/projektion/utm32s.prj Funny, three names for the same projection: - QPJ: ETRS89 / UTM zone 32N - PRJ (QGIS): ETRS89_UTM_zone_32N - PRJ (Geodatenzentrum): ETRS_1989_UTM_Zone_32N > I guess we better let the user decide with CRS to use, when we > don't find an accurate match. Even if there wouldn't be so > many duplicates, the frequency of> use may be different for > different areas of application and any automatism might > still fail and appear as a bug. But even then, the user must be aware of which is the correct CRS. I bet, it's complicated to code a notice to point out whether it is a CRS of national surveying or another... Best regards, Tobias _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
