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Convert RGNC91-93 to NEA74 Noumea

Convert coordinates from RGNC91-93 (EPSG:4749) to NEA74 Noumea (EPSG:4644) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4749-to-epsg-4644

Official EPSG transformation from RGNC91-93 to NEA74 Noumea

The EPSG Geodetic Parameter Dataset defines 1 transformation between RGNC91-93 (EPSG:4749) and NEA74 Noumea (EPSG:4644). Its parameters, accuracy and area of use are listed below.

RGNC91-93 to NEA74 Noumea (4)

EPSG:1295±0.05 m
Method:
NTv2
Area of use:
New Caledonia - Grande Terre - Noumea
Scope:
Geodesy.

Grid file: RGNC1991_NEA74Noumea.gsb

Emulation using NTv2 method of tfm NEA74 Noumea to RGNC91-93 (3) (code 15943). Note reversal of sign of parameter values in grid file.

Convert EPSG:4749 to EPSG:4644 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4749", "EPSG:4644", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4749 — RGNC91-93

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

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4749 →

Target: 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 →

Frequently asked questions

How accurate is converting RGNC91-93 to NEA74 Noumea?
The most accurate official EPSG transformation between these systems is accurate to about ±0.05 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:4644 to EPSG:4749 →