GEOGCS["GCS_Voirol_1875_Grad",
    DATUM["Voirol_1875",
        SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
            AUTHORITY["EPSG","7011"]],
        AUTHORITY["EPSG","6304"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["grad",0.0157079632679489,
        AUTHORITY["EPSG","9105"]],
    AUTHORITY["ESRI","104139"]]