BOUNDCRS[SOURCECRS[PROJCRS["ETRS89 / NTM zone 21",BASEGEOGCRS["ETRS89",ENSEMBLE["European Terrestrial Reference System 1989 ensemble",MEMBER["European Terrestrial Reference Frame 1989"],MEMBER["European Terrestrial Reference Frame 1990"],MEMBER["European Terrestrial Reference Frame 1991"],MEMBER["European Terrestrial Reference Frame 1992"],MEMBER["European Terrestrial Reference Frame 1993"],MEMBER["European Terrestrial Reference Frame 1994"],MEMBER["European Terrestrial Reference Frame 1996"],MEMBER["European Terrestrial Reference Frame 1997"],MEMBER["European Terrestrial Reference Frame 2000"],MEMBER["European Terrestrial Reference Frame 2005"],MEMBER["European Terrestrial Reference Frame 2014"],ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]],ENSEMBLEACCURACY[0.1]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4258]],CONVERSION["Norway TM zone 21",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",21.5,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",100000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",1000000,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["northing (N)",north,ORDER[1],LENGTHUNIT["metre",1]],AXIS["easting (E)",east,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering survey."],AREA["Norway - onshore - between 21°E and 22°E."],BBOX[69.03,21,70.73,22.01]],ID["EPSG",4871]]],TARGETCRS[GEOGCRS["GWPBS22-IRF",DATUM["GWPBS22 Intermediate Reference Frame",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic latitude (Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic longitude (Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],USAGE[SCOPE["Engineering survey and topographic mapping for railway applications."],AREA["United Kingdom (UK) - on or related to the rail route from London (Paddington) to Swansea."],BBOX[51.25,-4.26,52.06,-0.1]],ID["EPSG",10209]]],ABRIDGEDTRANSFORMATION["ETRS89 to GWPBS22-IRF (1)",METHOD["NTv2",ID["EPSG",9615]],PARAMETERFILE["Latitude and longitude difference file","TN15-ETRS89-to-GWPBS22-IRF.gsb"],USAGE[SCOPE["Engineering survey and topographic mapping for railway applications."],AREA["United Kingdom (UK) - on or related to the rail route from London (Paddington) to Swansea."],BBOX[51.25,-4.26,52.06,-0.1]],ID["EPSG",10210],REMARK["In conjunction with the GW22-LCC map projection (code 10211) applied to GWPBS22-IRF (code 10209), emulates the GWPBS22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines GWPBS22-IRF hence is errorless.						"]]]