4041=GEOGCS["Unknown datum based upon the Average Terrestrial System 1977 ellipsoid (deprecated)",DATUM["Not_specified_based_on_Average_Terrestrial_System_1977_ellipsoid",SPHEROID["Average Terrestrial System 1977",6378135,298.257,AUTHORITY["EPSG","7041"]],AUTHORITY["EPSG","6041"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4041"]]