EPSG:9451Vertical
BI height
Type
Vertical
Unit
metre
Area of use
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.
proj4 definition
+vunits=m +no_defs +type=crs
Well-Known Text (WKT)
VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]