Well Known Text
 
WKT Version 2
COORDINATEOPERATION["ATS77 to NAD83(CSRS)v6 (4)",VERSION["NSGC-Can NS v2"],SOURCECRS[GEOGCRS["ATS77",DATUM["Average Terrestrial System 1977",ELLIPSOID["Average Terrestrial System 1977",6378135,298.257,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7041]],ID["EPSG",6122]],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",4122]]],TARGETCRS[GEOGCRS["NAD83(CSRS)v6",DATUM["North American Datum of 1983 (CSRS) version 6",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7019]], ANCHOREPOCH[2010],ID["EPSG",1197]],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",8252]]],METHOD["NTv2",ID["EPSG",9615]],PARAMETERFILE["Latitude and longitude difference file","NS778302.gsb",ID["EPSG",8656]],OPERATIONACCURACY[0.06],ID["EPSG",9106]]