VERT_CS["SHOM 1953 (MAYOTTE)",
    VERT_DATUM["SHOM 1953 (MAYOTTE)",2005,
        AUTHORITY["IGNF","REA038"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["IGNF","MAYO53"]]