OGRErr OGRGeometryFactory::createFromWkt(char **ppszData, OGRSpatialReference * poSR, OGRGeometry **ppoReturn ) { OGRErr eErr; char szToken[OGR_WKT_TOKEN_MAX]; char *pszInput = *ppszData; OGRGeometry *poGeom; *ppoReturn = NULL; /* -------------------------------------------------------------------- */ /* Get the first token, which should be the geometry type. */ /* -------------------------------------------------------------------- */ if( OGRWktReadToken( pszInput, szToken ) == NULL ) return OGRERR_CORRUPT_DATA; /* -------------------------------------------------------------------- */ /* Instantiate a geometry of the appropriate type. */ /* -------------------------------------------------------------------- */ if( EQUAL(szToken,"POINT") ) { poGeom = new OGRPoint(); } else if( EQUAL(szToken,"LINESTRING") ) { poGeom = new OGRLineString(); } else if( EQUAL(szToken,"POLYGON") ) { poGeom = new OGRPolygon(); } else if( EQUAL(szToken,"GEOMETRYCOLLECTION") ) { poGeom = new OGRGeometryCollection(); } else if( EQUAL(szToken,"MULTIPOLYGON") ) { poGeom = new OGRMultiPolygon(); } else if( EQUAL(szToken,"MULTIPOINT") ) { poGeom = new OGRMultiPoint(); } else if( EQUAL(szToken,"MULTILINESTRING") ) { poGeom = new OGRMultiLineString(); } else { return OGRERR_UNSUPPORTED_GEOMETRY_TYPE; } /* -------------------------------------------------------------------- */ /* Do the import. */ /* -------------------------------------------------------------------- */ eErr = poGeom->importFromWkt( &pszInput ); /* -------------------------------------------------------------------- */ /* Assign spatial reference system. */ /* -------------------------------------------------------------------- */ if( eErr == OGRERR_NONE ) { poGeom->assignSpatialReference( poSR ); *ppoReturn = poGeom; *ppszData = pszInput; } else { delete poGeom; } return eErr; }