COMPD_CS["Mare IGN53 geographiques (dms) et NIVELLEMENT GENERAL DE MARE (IGN 1991 MR)",
    GEOGCS["Mare IGN53 geographiques (dms)",
        DATUM["IGN53_Mare",
            SPHEROID["International 1924",6378388,297,
                AUTHORITY["EPSG","7022"]],
            AUTHORITY["EPSG","6641"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["IGNF","MARE53G"]],
    VERT_CS["NIVELLEMENT GENERAL DE MARE (IGN 1991 MR)",
        VERT_DATUM["NIVELLEMENT GENERAL DE MARE (IGN 1991 MR)",2005,
            AUTHORITY["IGNF","REA035"]],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["IGNF","MARE91"]],
    AUTHORITY["IGNF","MARE53G.MARE91"]]