VERTCRS["Caspian height",VDATUM["Caspian Sea"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Oil and gas exploration and production."],AREA["Azerbaijan - offshore; Kazakhstan - offshore; Russian Federation - Caspian Sea; Turkmenistan - offshore."],BBOX[37.35,46.95,46.97,53.93]],ID["EPSG",5611]]