VERT_CS["ODN Orkney height",
    VERT_DATUM["Ordnance Datum Newlyn (Orkney Isles)",2005,
        AUTHORITY["EPSG","5138"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","5740"]]