Thank you again, Even. Well, I've taken a look at the documentation you mention, but no answers there, just an explanation about wgsto84 parameters and a proposal for extending the geotiff standard in order to embed the famous parameter. I guess that if you don't say "oh man, didn' you know this famous trick...?" is because the trick does not exist. So, before I continue wasting your time, would you be so kind to answer this two questions? (yes/no will be enough)
1) Do I need the towgs84 parameters to properly do transformations between coordinate systems using proj4? 2) The only way to obtain that parameter is by using the "epsg" file, and therefore I MUST know the EPSG? Thak you! -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Unable-to-create-OGRSpatialReference-tp5009903p5009950.html Sent from the GDAL - Dev mailing list archive at Nabble.com. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev