VERT_CS["Unknown_height_system_(Intl_Feet)",
    VERT_DATUM["Unknown_height_system_(Intl_feet)",2005,
        AUTHORITY["ESRI","105112"]],
    UNIT["foot",0.3048,
        AUTHORITY["EPSG","9002"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["ESRI","115809"]]