VERTCRS["NVD 1992 height",
    VDATUM["National Vertical Datum 1992"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, cadastre, engineering survey, topographic mapping."],
        AREA["Bangladesh - onshore."],
        BBOX[20.52,88.01,26.64,92.67]],
    ID["EPSG",9681]]