<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">Hello.<br><br> <div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div>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?:<br><br>PROJCS["UTM Zone 30, Northern Hemisphere",GEOGCS["Geographic Coordinate
System",<br>DATUM["EUROPEAN_1950_(SPAIN_AND_PORTUGAL)",<br>SPHEROID["International_1909_Hayford_Intl_1924",6378388,297.0000000284015]],<br>PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],<br>PROJECTION["Transverse_Mercator"],<br>PARAMETER["latitude_of_origin",0],<br>PARAMETER["central_meridian",-3],<br>PARAMETER["scale_factor",0.9996],<br>PARAMETER["false_easting",500000],<br>PARAMETER["false_northing",0],<br>UNIT["Meter",1]]<br><br>AutoIdentifyEPSG() is unable to find out the EPSG code, so I can't figure out how to get the TOWGS84 parameters.<br><br>Any help appreciated.<br></div>
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