NZMG: New Zealand Map Grid7-parameter transformation: WKT: PROJCS["New Zealand Map Grid", GEOGCS["unnamed", DATUM["New_Zealand_GD49", SPHEROID["International 1924",6378388,297], TOWGS84[-59.47,-5.04,187.44,-0.47,0.10,-1.024,-4.5993]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]], PROJECTION["New_Zealand_Map_Grid"], PARAMETER["latitude_of_origin",-41], PARAMETER["central_meridian",173], PARAMETER["false_easting",2510000], PARAMETER["false_northing",6023150], UNIT["Meter",1]] High accurate grid-shift file transformation: You need "nzgd2kgrid0005.gsb" from http://download.osgeo.org/proj/proj-datumgrid-1.4.zip WKT: PROJCS["New Zealand Map Grid", GEOGCS["International 1909 (Hayford)", DATUM["unknown", SPHEROID["intl",6378388,297]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]], PROJECTION["New_Zealand_Map_Grid"], PARAMETER["latitude_of_origin",-41], PARAMETER["central_meridian",173], PARAMETER["false_easting",2510000], PARAMETER["false_northing",6023150], UNIT["Meter",1], EXTENSION["PROJ4","+proj=nzmg +lat_0=-41 +lon_0=173 +x_0=2510000 +y_0=6023150 +ellps=intl +units=m +nadgrids=nzgd2kgrid0005.gsb +wktext"]] |