mswkt = '''GEOGCS["S-JTSK",DATUM["System_of_the_Unified_Trigonometrical_Cadastral_Network",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[589,76,480,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4156"]]''' m = mapObj('') m.setWKTProjection(mswkt) lyr = layerObj(m) lyr.setWKTProjection(mswkt)