Datums, Projections & Heights

Find detailed information about current and superseded geodetic datums, vertical datums, projections, and their accuracy classifications (orders), including background, parameters and related standards.

Geodetic datums

• New Zealand Geodetic Datum 2000 (NZGD2000)
• Ross Sea Region Geodetic Datum 2000 (RSRGD2000)
• World Geodetic System 1984 (WGS84)
• New Zealand Geodetic Datum 1949 (NZGD1949)
• Chatham Islands Geodetic Datum 1979 (CIGD1979)
• Chatham Islands Geodetic Datum 1971 (CIGD1971)

Vertical datums

• New Zealand Geodetic Datum 2000 (ellipsoidal heights)
• New Zealand Quasigeoid 2005 (NZGeoid05)
• Mean sea level datums (normal-orthometric heights)
• Earth Gravity Model 1996 (EGM96)
• Tidal level information for surveyors

Projections

• New Zealand Transverse Mercator 2000 (NZTM2000)
• NZGD2000 meridional circuits
• New Zealand offshore island projections
• New Zealand Continental Shelf Lambert Conformal 2000 projection (NZCS2000)
• New Zealand Map Grid (NZMG)
• Chatham Islands Transverse Mercator 1979 (CITM1979)
• North and South Island yard grids (NIYG, SIYG)
• Darwin Glacier Lambert Conformal 2000 projection (DGLC2000)

Coordinate & height Orders

This section describes the accuracy classifications or Orders of coordinates and heights in terms of the different datums. more...

NZGD2000 frequently asked questions

The New Zealand Geodetic Datum 2000 (NZGD2000) was implemented in 1998. This section describes some of the common questions about the development of the datum and the transition from the New Zealand Geodetic Datum 1949 (NZGD1949). more...