VERTCRS["BI height",ENSEMBLE["British Isles height ensemble",MEMBER["Malin Head"],MEMBER["Belfast Lough"],MEMBER["Ordnance Datum Newlyn"],MEMBER["Ordnance Datum Newlyn (Offshore)"],MEMBER["Ordnance Datum Newlyn (Orkney Isles)"],MEMBER["Lerwick"],MEMBER["Stornoway"],MEMBER["Douglas"],MEMBER["St. Marys"],ENSEMBLEACCURACY[0.4]],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Spatial referencing."],AREA["United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore."],BBOX[49.75,-10.85,61.01,2.01]],ID["EPSG",9451]]