VERTCRS["Yemen_NGN_1996",
    VDATUM["D_Yemen_NGN_1996"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Yemen - onshore and offshore."],
        BBOX[8.95,41.08,19,57.96]],
    ID["ESRI",115802]]