Well Known Text
 
WKT Version 2
COORDINATEOPERATION["NAD27 to NAD83 (6)",VERSION["SGQ-Can QC NT2"],SOURCECRS[GEOGCRS["NAD27",DATUM["North American Datum 1927",ELLIPSOID["Clarke 1866",6378206.4,294.978698213901,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7008]],ID["EPSG",6267]],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",4267]]],TARGETCRS[GEOGCRS["NAD83",DATUM["North American Datum 1983",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7019]],ID["EPSG",6269]],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",4269]]],METHOD["NTv2",ID["EPSG",9615]],PARAMETERFILE["Latitude and longitude difference file","NA27NA83.GSB",ID["EPSG",8656]],OPERATIONACCURACY[1.5],ID["EPSG",1573]]