COMPD_CS["RGM23 / UTM zone 38S + IGN 2023 Mayotte height",
    PROJCS["RGM23 / UTM zone 38S",
        GEOGCS["RGM23",
            DATUM["Mayotte_Geodetic_Reference_Frame_2023",
                SPHEROID["GRS 1980",6378137,298.257222101,
                    AUTHORITY["EPSG","7019"]],
                AUTHORITY["EPSG","1389"]],
            PRIMEM["Greenwich",0,
                AUTHORITY["EPSG","8901"]],
            UNIT["degree",0.0174532925199433,
                AUTHORITY["EPSG","9122"]],
            AUTHORITY["EPSG","10671"]],
        PROJECTION["Transverse_Mercator"],
        PARAMETER["latitude_of_origin",0],
        PARAMETER["central_meridian",45],
        PARAMETER["scale_factor",0.9996],
        PARAMETER["false_easting",500000],
        PARAMETER["false_northing",10000000],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Easting",EAST],
        AXIS["Northing",NORTH],
        AUTHORITY["EPSG","10674"]],
    VERT_CS["IGN 2023 Mayotte height",
        VERT_DATUM["IGN 2023 Mayotte",2005,
            AUTHORITY["EPSG","1443"]],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","11157"]],
    AUTHORITY["EPSG","12209"]]