New Zealand




NZMG: New Zealand Map Grid


7-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"]]

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