Well Known Text
WKT Version 2
COORDINATEOPERATION["ETRS89 to BI height (1)",VERSION["OS-Gbr 2015"],SOURCECRS[GEOGCRS["ETRS89",ENSEMBLE["European Terrestrial Reference System 1989 ensemble", MEMBER["European Terrestrial Reference Frame 1989", ID["EPSG",1178]], MEMBER["European Terrestrial Reference Frame 1990", ID["EPSG",1179]], MEMBER["European Terrestrial Reference Frame 1991", ID["EPSG",1180]], MEMBER["European Terrestrial Reference Frame 1992", ID["EPSG",1181]], MEMBER["European Terrestrial Reference Frame 1993", ID["EPSG",1182]], MEMBER["European Terrestrial Reference Frame 1994", ID["EPSG",1183]], MEMBER["European Terrestrial Reference Frame 1996", ID["EPSG",1184]], MEMBER["European Terrestrial Reference Frame 1997", ID["EPSG",1185]], MEMBER["European Terrestrial Reference Frame 2000", ID["EPSG",1186]], MEMBER["European Terrestrial Reference Frame 2005", ID["EPSG",1204]], MEMBER["European Terrestrial Reference Frame 2014", ID["EPSG",1206]], MEMBER["European Terrestrial Reference Frame 2020", ID["EPSG",1382]], ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7019]], ENSEMBLEACCURACY[0.1],ID["EPSG",6258]],CS[ellipsoidal,3,ID["EPSG",6423]],AXIS["Geodetic latitude (Lat)",north,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]],AXIS["Geodetic longitude (Lon)",east,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]],AXIS["Ellipsoidal height (h)",up,LENGTHUNIT["metre",1,ID["EPSG",9001]]],ID["EPSG",4937]]],TARGETCRS[VERTCRS["BI height",ENSEMBLE["British Isles height ensemble", MEMBER["Malin Head", ID["EPSG",5130]], MEMBER["Belfast Lough", ID["EPSG",5131]], MEMBER["Ordnance Datum Newlyn", ID["EPSG",5101]], MEMBER["Ordnance Datum Newlyn (Offshore)", ID["EPSG",1164]], MEMBER["Ordnance Datum Newlyn (Orkney Isles)", ID["EPSG",5138]], MEMBER["Lerwick", ID["EPSG",5140]], MEMBER["Stornoway", ID["EPSG",5144]], MEMBER["Douglas", ID["EPSG",5148]], MEMBER["St. Marys", ID["EPSG",5147]], ENSEMBLEACCURACY[0.4],ID["EPSG",1288]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],GEOIDMODEL["ETRS89 to BI height (1)",ID["EPSG",9914]],GEOIDMODEL["ETRS89 to BI height (2)",ID["EPSG",9916]],GEOIDMODEL["ETRS89 to BI height (3)",ID["EPSG",9918]],ID["EPSG",9451]]],METHOD["Geographic3D to GravityRelatedHeight (OSGM-GB)",ID["EPSG",9663]],PARAMETERFILE["Geoid (height correction) model file","OSTN15_OSGM15_GB.txt",ID["EPSG",8666]],OPERATIONACCURACY[0.02],ID["EPSG",9914]]