Well Known Text
WKT Version 2
COORDINATEOPERATION["WGS 84 to EGM84 height (1)",VERSION["NGA-World"],SOURCECRS[GEOGCRS["WGS 84",ENSEMBLE["World Geodetic System 1984 ensemble",MEMBER["World Geodetic System 1984 (Transit)",ID["EPSG",1166]],MEMBER["World Geodetic System 1984 (G730)",ID["EPSG",1152]],MEMBER["World Geodetic System 1984 (G873)",ID["EPSG",1153]],MEMBER["World Geodetic System 1984 (G1150)",ID["EPSG",1154]],MEMBER["World Geodetic System 1984 (G1674)",ID["EPSG",1155]],MEMBER["World Geodetic System 1984 (G1762)",ID["EPSG",1156]],MEMBER["World Geodetic System 1984 (G2139)",ID["EPSG",1309]],MEMBER["World Geodetic System 1984 (G2296)",ID["EPSG",1383]],ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7030]],ENSEMBLEACCURACY[2],ID["EPSG",6326]],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",4979]]],TARGETCRS[VERTCRS["EGM84 height",VDATUM["EGM84 geoid",ID["EPSG",5203]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],GEOIDMODEL["WGS 84 to EGM84 height (1)",ID["EPSG",15781]],ID["EPSG",5798]]],METHOD["Geographic3D to GravityRelatedHeight (EGM)",ID["EPSG",9661]],PARAMETERFILE["Geoid (height correction) model file","DIRACC.DAT",ID["EPSG",8666]],OPERATIONACCURACY[1],ID["EPSG",15781]]