VERT_CS["NGF-IGN 1978",
    VERT_DATUM["NGF-IGN 1978",2005,
        AUTHORITY["IGNF","REA011"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["IGNF","IGN78C"]]