mswkt = '''GEOGCS["Aratu",DATUM["Aratu",SPHEROID["International 1924",6378388,297],TOWGS84[-151.99,287.04,-147.45,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4208"]]''' m = mapObj('') m.setWKTProjection(mswkt) lyr = layerObj(m) lyr.setWKTProjection(mswkt)