COMPD_CS["NAD27 + NGVD29 height",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.9786982139006,
                AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4267"]],
    VERT_CS["NGVD29 height",
        VERT_DATUM["National Geodetic Vertical Datum 1929",2005,
            AUTHORITY["EPSG","5102"]],
        UNIT["US survey foot",0.3048006096012192,
            AUTHORITY["EPSG","9003"]],
        AXIS["Up",UP],
        AUTHORITY["EPSG","5702"]],
    AUTHORITY["EPSG","7406"]]