Convert coordinates from NZGD49 (EPSG:4272) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 4 transformations between NZGD49 (EPSG:4272) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.
Grid file: nzgd2kgrid0005.gsb
Parameter file is from NZGD49 to NZGD2000 (3) (code 1568) and assumes WGS 84 is coincident with NZGD2000 to the accuracy of the transformation.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 59.47 | metre |
| Y-axis translation(ty) | -5.04 | metre |
| Z-axis translation(tz) | 187.44 | metre |
| X-axis rotation(rx) | -0.47 | arc-second |
| Y-axis rotation(ry) | 0.1 | arc-second |
| Z-axis rotation(rz) | -1.024 | arc-second |
| Scale difference(ds) | -4.5993 | parts per million |
These parameter values are taken from NZGD49 to NZGD2000 (2) (code 1701) and assume that NZGD2000 and WGS 84 are coincident to within the accuracy of the transformation. For improved accuracy use NZGD49 to WGS 84 (4) (code 1670).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 54.4 | metre |
| Y-axis translation(ty) | -20.1 | metre |
| Z-axis translation(tz) | 183.1 | metre |
These parameter values are taken from NZGD49 to NZGD2000 (1) (code 1566) and assume that NZGD2000 and WGS 84 are coincident to within the accuracy of the tfm. For better accuracy use NZGD49 to WGS 84 (2) (code 1564) or NZGD49 to WGS 84 (3) (code 1670).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 84 | metre |
| Y-axis translation(ty) | -22 | metre |
| Z-axis translation(tz) | 209 | metre |
Derived at 14 stations. Accuracy 5m, 3m and 5m in X, Y and Z axes.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4272", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude and longitude on an ellipsoid · Area of use: New Zealand - onshore and nearshore
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4272 →
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →