VERTCRS["NAVD88 height (ft)",
    VDATUM["North American Vertical Datum 1988"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["foot",0.3048]],
    USAGE[
        SCOPE["Engineering survey, GIS, topographic mapping."],
        AREA["United States (USA) - onshore - Arizona; Michigan; Montana; North Dakota; Oregon; South Carolina."],
        BBOX[31.33,-124.6,49.01,-78.52]],
    ID["EPSG",8228]]