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Convert IGN56 Lifou to RGNC91-93

Convert coordinates from IGN56 Lifou (EPSG:4633) to RGNC91-93 (EPSG:4749) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4633-to-epsg-4749

Official EPSG transformations from IGN56 Lifou to RGNC91-93

The EPSG Geodetic Parameter Dataset defines 2 transformations between IGN56 Lifou (EPSG:4633) and RGNC91-93 (EPSG:4749). Each applies to a specific area — pick the one whose area of use covers your data.

IGN56 Lifou to RGNC91-93 (2)

EPSG:15890±0.1 mBest accuracy
Method:
Coordinate Frame rotation (geog2D domain)
Area of use:
New Caledonia - Lifou
Scope:
Transformation of coordinates at 0.1m level of accuracy.
ParameterValueUnit
X-axis translation(tx)137.092metre
Y-axis translation(ty)131.675metre
Z-axis translation(tz)91.478metre
X-axis rotation(rx)1.9435arc-second
Y-axis rotation(ry)11.5995arc-second
Z-axis rotation(rz)4.3316arc-second
Scale difference(ds)-7.4801parts per million

Determined in April 1993.

IGN56 Lifou to RGNC91-93 (1)

EPSG:15883±1 m
Method:
Geocentric translations (geog2D domain)
Area of use:
New Caledonia - Lifou
Scope:
Transformation of coordinates at 1m level of accuracy.
ParameterValueUnit
X-axis translation(tx)335.47metre
Y-axis translation(ty)222.58metre
Z-axis translation(tz)-230.94metre

Determined in April 1993. May be taken as approximate transformation to WGS 84 - see IGN56 Lifou to WGS 84 (3) (code 15902).

Convert EPSG:4633 to EPSG:4749 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4633", "EPSG:4749", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4633 — IGN56 Lifou

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

+proj=longlat +ellps=intl +towgs84=335.47,222.58,-230.94,0,0,0,0 +no_defs +type=crs
More about EPSG:4633 →

Target: 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 →

Frequently asked questions

How accurate is converting IGN56 Lifou to RGNC91-93?
The most accurate official EPSG transformation between these systems is accurate to about ±0.1 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:4749 to EPSG:4633 →