Convert IGN56 Lifou to WGS 84

Convert coordinates from IGN56 Lifou (EPSG:4633) 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-4633-to-epsg-4326

Official EPSG transformations from IGN56 Lifou to WGS 84

The EPSG Geodetic Parameter Dataset defines 3 transformations between IGN56 Lifou (EPSG:4633) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

IGN56 Lifou to WGS 84 (2)

EPSG:1927±1 mBest accuracy

Method:: Position Vector transformation (geog2D domain)
Area of use:: New Caledonia - Lifou
Scope:: Transformation of coordinates at 1m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	137.092	metre
Y-axis translation(ty)	131.66	metre
Z-axis translation(tz)	91.475	metre
X-axis rotation(rx)	-1.9436	arc-second
Y-axis rotation(ry)	-11.5993	arc-second
Z-axis rotation(rz)	-4.3321	arc-second
Scale difference(ds)	-7.4824	parts per million

Withdrawn by information source and replaced by improved information - see CT code 15902.

IGN56 Lifou to WGS 84 (3)

EPSG:15902±1 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Lifou
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)	335.47	metre
Y-axis translation(ty)	222.58	metre
Z-axis translation(tz)	-230.94	metre

Parameter values taken from IGN56 Lifou to RGNC91-93 (1) (code 15883) assuming that RGNC91-93 is equivalent to WGS 84 to within the accuracy of the transformation.

IGN56 Lifou to WGS 84 (1)

EPSG:1917±10 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Lifou
Scope:: Transformation of coordinates at 10m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	336	metre
Y-axis translation(ty)	223	metre
Z-axis translation(tz)	-231	metre

Withdrawn by information source and replaced by improved information from local authority - see tfm code 15902.

Convert EPSG:4633 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4633", "EPSG:4326", 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: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 IGN56 Lifou 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:4633 →