PROJCS["ATIG Bonne France Etat Major",
    GEOGCS["ATIG geographiques grades Paris (gr)",
        DATUM["Ancienne_Triangulation_Francaise_Paris",
            SPHEROID["Plessis 1817",6376523,308.64,
                AUTHORITY["EPSG","7027"]],
            AUTHORITY["EPSG","6901"]],
        PRIMEM["Paris RGS",2.33720833333333,
            AUTHORITY["EPSG","8914"]],
        UNIT["grad",0.0157079632679489,
            AUTHORITY["EPSG","9105"]],
        AUTHORITY["IGNF","ATIGG"]],
    PROJECTION["Bonne"],
    PARAMETER["standard_parallel_1",50],
    PARAMETER["central_meridian",0],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["IGNF","ATIGBONNE"]]