> I know why raster data made by GDAL show "RAW" string as projection > information, documentation explain it: > > When writing coordinate system information to ECW files, many less common > > coordinate systems are not mapped properly. If you know the ECW name for > the > > coordinate system you can force it to be set at creation time with the PROJ > > and DATUM creation options. > > As I did not use DATUM and PROJ creation option GDAL don't add it!
Yes, the mapping between WKT representation and ECW DATUM/PROJ is not perfect, especially in the WKT -> DATUM/PROJ direction (the other direction is simpler). You could perhaps try the updated ecw_cs.wkt file attached to ticket http://trac.osgeo.org/gdal/ticket/4127 > > Finally I saw that gdal create only an aux.xml file to store his own proj > information and don't use the projection information from the header file. If > I > create this aux.xml file for all of my raster data it could work. Yes, .aux.xml is a solution that works for most GDAL drivers. But of course, it will only work in the GDAL-based software world. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev