Well Known Text
 
WKT Version 2
PROJCRS["NZGD49 / Grey Circuit",BASEGEOGCRS["NZGD49",DATUM["New Zealand Geodetic Datum 1949",ELLIPSOID["International 1924",6378388,297,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7022]],ID["EPSG",6272]],ID["EPSG",4272]],CONVERSION["Grey Circuit",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",-42.3336942777781,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",171.549771305556,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",300000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8806]],PARAMETER["False northing",700000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8807]],ID["EPSG",17914]],CS[Cartesian,2,ID["EPSG",4500]],AXIS["Northing (N)",north],AXIS["Easting (E)",east],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",27218]]