Convert NEA74 Noumea to WGS 84

Convert coordinates from NEA74 Noumea (EPSG:4644) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4644-to-epsg-4326

Official EPSG transformation from NEA74 Noumea to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between NEA74 Noumea (EPSG:4644) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

NEA74 Noumea to WGS 84 (2)

EPSG:15904±1 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Grande Terre - Noumea
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-10.18	metre
Y-axis translation(ty)	-350.43	metre
Z-axis translation(tz)	291.37	metre

Parameter values taken from NEA74 Noumea to RGNC91-93 (1) (code 15886) assuming that RGNC91-93 is equivalent to WGS 84 to within the accuracy of the transformation.

Convert EPSG:4644 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4644", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4644 — NEA74 Noumea

geographic system using latitude and longitude on an ellipsoid · Area of use: New Caledonia - Grande Terre - Noumea

+proj=longlat +ellps=intl +towgs84=-10.18,-350.43,291.37,0,0,0,0 +no_defs +type=crs

More about EPSG:4644 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting NEA74 Noumea to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±1 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:4326 to EPSG:4644 →