Well Known Text
 
WKT Version 2
PROJCRS["RT90 0 gon",BASEGEOGCRS["RT90",DATUM["Rikets koordinatsystem 1990",ELLIPSOID["Bessel 1841",6377397.155,299.1528128,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7004]],ID["EPSG",6124]],ID["EPSG",4124]],CONVERSION["Sweden zone 0 gon",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",18.0582777777781,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1,ID["EPSG",9201]],ID["EPSG",8805]],PARAMETER["False easting",1500000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8807]],ID["EPSG",17336]],CS[Cartesian,2,ID["EPSG",4530]],AXIS["Northing (X)",north],AXIS["Easting (Y)",east],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",3022]]