On Fri, Aug 12, 2011 at 10:27 AM, Hermann Peifer <pei...@gmx.eu> wrote: > Thanks for the quick response, I will do as you suggested. I wasn't aware of > the ESRI:: prefix and wrongly assumed that GDAL would always auto-detect > ESRI-isms in the projection files and morph them. > > The background of the issue is that we disseminate a series of > GDAL-generated GeoTIFFs (all in EPSG:3035) via a public website, > http://www.eea.europa.eu/data-and-maps/data#c17=raster+data > > From experience, I know that ESRI users have trouble with some projection > and parameter names generated by GDAL and vice versa. Is it possible to > convince GDAL to store coordinate system information in a way that would be > "ESRI-friendly" and "GDAL-friendly" at the same time (and follow the OGC-WKT > "standard", as far as it exists ... I can't find it at > http://www.opengeospatial.org/standards) ? > > Thanks again for your time, Hermann
Hermann, In some cases the GeoTIFF driver will write a specially formatted PSC Citation geokey in the form "ESRI PE String = PROJ[...]" with the ESRI PE string for the coordinate system. It does this if the code feels we are unable to represent the coordinate system accurately via GeoTIFF tags. You could likely mess around in a way to force a particular PE string to get written by changing the corresponding code in gdal/frmts/gtiff/gt_wkt_srs.cpp (search for ESRI PE String and the section that *writes* it). In the case discussed in this thread the problem was really that GDAL never properly understood the coordinate system. Keep in mind that ArcGIS's support for GDAL GeoTIFFs is pretty good and getting better as it uses GDAL for GeoTIFF access. I'd rather discourage doing anything to hacky in this area. (It's already pretty messy). Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev