Dear list I have a shapefile with the following projection, see below (using 'ogrinfo -al Richmond_compartments_WGS84.shp')
I would like to perform a datum transformation from WGS84 to the Cape Datum using the clark 1880 spheroid. Is this possible using ogr? I have tried using ogr2ogr but have had no luck as I am not sure how to specify the correct projection parameters and am not sure if ogr supports the Cape Datum and clark 1880 spheroid. One error I receive is that the program fails to initialise PROJ.4. I have installed PROJ.4 prior to my grass instillation so it should be there. Could someone point me towards a tutorial or help file describing the supported datums and spheroids or give an example of the syntax used. Many thanks, Wesley ********************************************************************************************************************************************** INFO: Open of `Richmond_compartments_WGS84.shp' using driver `ESRI Shapefile' successful. Layer name: Richmond_compartments_WGS84 Geometry: Polygon Feature Count: 2798 Extent: (-101046.795901, -3391548.960746) - (-58458.688098, -3267168.091898) Layer SRS WKT: PROJCS["STMLO31", GEOGCS["WGS84", DATUM["WGS84", SPHEROID["WGS84",6378137.0,298.257223599998]], PRIMEM["Greenwich",0.0], UNIT["degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",0.0], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",31.0], PARAMETER["Scale_Factor",-1.0], PARAMETER["Latitude_of_Origin",0.0], UNIT["Meter",1.0]] ********************************************************************************************************************************************** -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev