VERT_CS["Chatham Island 1959 height",
    VERT_DATUM["Waitangi (Chatham Island) 1959",2005,
        AUTHORITY["EPSG","5169"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","5771"]]