VERT_CS["NGF-IGN78 height",
    VERT_DATUM["Nivellement General de la France - IGN78",2005,
        AUTHORITY["EPSG","5120"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","5721"]]