Hello.
How to determine the +towgs84 parameters required to do accurate coordinate transformations? I know there's a file (named epsg) which contains a list, but in order to use I think I need the EPSG code. Then, how to obtain EPSG code from (for ecample) this WKT?: PROJCS["UTM Zone 30, Northern Hemisphere",GEOGCS["Geographic Coordinate System", DATUM["EUROPEAN_1950_(SPAIN_AND_PORTUGAL)", SPHEROID["International_1909_Hayford_Intl_1924",6378388,297.0000000284015]], PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",-3], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",500000], PARAMETER["false_northing",0], UNIT["Meter",1]] AutoIdentifyEPSG() is unable to find out the EPSG code, so I can't figure out how to get the TOWGS84 parameters. Any help appreciated.
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