Well Known Text
 
WKT Version 2
COORDINATEOPERATION["ETRS89-GBR [OSNet v2009] to HS2-VRF height (1)",VERSION["HS2-Gbr HS2GM15 W"],SOURCECRS[GEOGCRS["ETRS89-GBR [OSNet v2009]",DATUM["OSNet v2009",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7019]],ANCHOREPOCH[2009.756],ID["EPSG",1425]],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",11008]]],TARGETCRS[VERTCRS["HS2-VRF height",VDATUM["HS2 Vertical Reference Frame",ID["EPSG",1265]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",9303]]],METHOD["Geographic3D to GravityRelatedHeight (EGM)",ID["EPSG",9661]],PARAMETERFILE["Geoid (height correction) model file","HS2GM15W.grd",ID["EPSG",8666]],OPERATIONACCURACY[0.001],ID["EPSG",9304]]


