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["GS-IRF",DATUM["Generalstabens System Intermediate Datum",ELLIPSOID["Danish 1876",6377019.27,300,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["Intermediate stage in transformations - not used otherwise."],AREA["Denmark - onshore Jutland, Funen, Zealand and Lolland."],BBOX[54.51,8,57.8,12.87]],ID["EPSG",10256]]],ABRIDGEDTRANSFORMATION["ETRS89 to GS-IRF (1)",METHOD["NTv2",ID["EPSG",9615]],PARAMETERFILE["Latitude and longitude difference file","gs_2022.gsb"],USAGE[SCOPE["Intermediate stage in transformations - not used otherwise."],AREA["Denmark - onshore Jutland, Funen, Zealand and Lolland."],BBOX[54.51,8,57.8,12.87]],ID["EPSG",10259],REMARK["In conjunction with the GS LCC map projection (code 10257) applied to GS-IRF (code 10256), enables transformation of coordinates between the historic Generalstabens System and ETRS89. File is also available in GeoTIFF format (gs_2022.tif)."]]]