VERTCRS["SLD99",
    VDATUM["D_Sri_Lanka_Datum_1999"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Sri Lanka - onshore."],
        BBOX[5.86,79.64,9.88,81.95]],
    ID["ESRI",115793]]