VERT_CS["NAVD88 height (ft)",
    VERT_DATUM["North American Vertical Datum 1988",2005,
        AUTHORITY["EPSG","5103"]],
    UNIT["foot",0.3048,
        AUTHORITY["EPSG","9002"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","8228"]]