Well Known Text
 
WKT Version 2
COORDINATEOPERATION["GDA2020 to AHD height (1)",VERSION["GA-Aus 2020"],SOURCECRS[GEOGCRS["GDA2020",DATUM["Geocentric Datum of Australia 2020",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7019]],ID["EPSG",1168]],CS[ellipsoidal,3,ID["EPSG",6423]],AXIS["Geodetic latitude (Lat)",north,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]],AXIS["Geodetic longitude (Lon)",east,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]],AXIS["Ellipsoidal height (h)",up,LENGTHUNIT["metre",1,ID["EPSG",9001]]],ID["EPSG",7843]]],TARGETCRS[VERTCRS["AHD height",VDATUM["Australian Height Datum",ID["EPSG",5111]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],GEOIDMODEL["GDA94 to AHD height (49)",ID["EPSG",5656]],GEOIDMODEL["GDA2020 to AHD height (1)",ID["EPSG",8451]],ID["EPSG",5711]]],METHOD["Geographic3D to GravityRelatedHeight (AUSGeoid v2)",ID["EPSG",1048]],PARAMETERFILE["Geoid (height correction) model file","AUSGeoid2020_20180201.gsb",ID["EPSG",8666]],OPERATIONACCURACY[0.15],ID["EPSG",8451]]