Well Known Text

COORDINATEOPERATION["ETRS89-GBR [OSNet v2009] to OSGB36 / British National Grid (3)",VERSION["OSGB-UK Gbr15"],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,2,ID["EPSG",6422]],AXIS["Geodetic latitude (Lat)",north],AXIS["Geodetic longitude (Lon)",east],ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",11009]]],TARGETCRS[PROJCRS["OSGB36 / British National Grid",BASEGEOGCRS["OSGB36",DATUM["Ordnance Survey of Great Britain 1936",ELLIPSOID["Airy 1830",6377563.396,299.3249646,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7001]],ID["EPSG",6277]],ID["EPSG",4277]],CONVERSION["British National Grid",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",49,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-2,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.9996012717,SCALEUNIT["unity",1,ID["EPSG",9201]],ID["EPSG",8805]],PARAMETER["False easting",400000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8806]],PARAMETER["False northing",-100000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8807]],ID["EPSG",19916]],CS[Cartesian,2,ID["EPSG",4400]],AXIS["Easting (E)",east],AXIS["Northing (N)",north],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",27700]]],METHOD["Ordnance Survey National Transformation",ID["EPSG",9633]],PARAMETERFILE["Easting and northing difference file","OSTN15_OSGM15_GB.txt",ID["EPSG",8664]],OPERATIONACCURACY[0],ID["EPSG",7953]]