[Proj] Working with NZGD2000 and NZTM2000

Hamish hamish_b at yahoo.com
Thu Sep 10 14:32:13 EST 2009

Mohammad Raza wrote:
> I am trying to get my copy of Proj4 prepped up for NZGD2000
> and NZTM2000.
> Does Proj4(.6.1) support NZGD2000 and NZTM2000? If not,
> what do I need to do to add support for these datums?

NZGD2000 is essentially WGS84 with the GRS80 ellipsoid.
"+ellps=grs80 +towgs84=0,0,0" is enough for most purposes.

There is no such thing as NZTM2000 datum. The NZ trans. merc.
projection is defined as using the NZGD2000 datum.

see EPSG 2192,


and Cliff's Grids and Datums column in PE&RS,

NZGD 2000 supersedes NZGD 1949.



More information about the Proj mailing list