VERT_CS["NAVD88_height_(ftUS)",
    VERT_DATUM["North American Vertical Datum 1988",2005,
        AUTHORITY["EPSG","5103"]],
    UNIT["US survey foot",0.304800609601219,
        AUTHORITY["EPSG","9003"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["ESRI","105703"]]