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Convert ITRF97 to NZGD2000

Convert coordinates from ITRF97 (EPSG:4918) to NZGD2000 (EPSG:4959) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4918-to-epsg-4959

Official EPSG transformation from ITRF97 to NZGD2000

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF97 (EPSG:4918) and NZGD2000 (EPSG:4959). Its parameters, accuracy and area of use are listed below.

ITRF97 to NZGD2000 (1)

EPSG:9091±0.03 m
Method:
Concatenated operation
Area of use:
New Zealand - onshore and nearshore
Scope:
Geodesy.
  1. ITRF97 to ITRF96 (2) (null)
  2. ITRF96 to NZGD2000 (1) (null)

Step 1 is in geocentric coordinate domain, step 2 in geographic 3D coordinate domain. See CT 1565 for low accuracy applications.

Convert EPSG:4918 to EPSG:4959 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4918", "EPSG:4959", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4918 — ITRF97

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: World

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs
More about EPSG:4918 →

Target: EPSG:4959 — NZGD2000

geographic system using latitude, longitude and ellipsoidal height · Area of use: New Zealand

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4959 →

Frequently asked questions

How accurate is converting ITRF97 to NZGD2000?
The most accurate official EPSG transformation between these systems is accurate to about ±0.03 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation in a desktop GIS.
Does my data leave the browser when I use this converter?
No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.
Need the reverse? Convert EPSG:4959 to EPSG:4918 →