VERT_CS["SLD99",
    VERT_DATUM["D_Sri_Lanka_Datum_1999",2002,
        AUTHORITY["ESRI","from_geogdatum_EPSG_1053"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Ellipsoidal height",UP],
    AUTHORITY["ESRI","115793"]]