Convert IGN53 Mare to WGS 84

Convert coordinates from IGN53 Mare (EPSG:4641) 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-4641-to-epsg-4326

Official EPSG transformations from IGN53 Mare to WGS 84

The EPSG Geodetic Parameter Dataset defines 3 transformations between IGN53 Mare (EPSG:4641) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

IGN53 Mare to WGS 84 (1)

EPSG:1928±1 mBest accuracy

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

Parameter	Value	Unit
X-axis translation(tx)	-408.809	metre
Y-axis translation(ty)	366.856	metre
Z-axis translation(tz)	-412.987	metre
X-axis rotation(rx)	1.8842	arc-second
Y-axis rotation(ry)	-0.5308	arc-second
Z-axis rotation(rz)	2.1655	arc-second
Scale difference(ds)	-121.0993	parts per million

Withdrawn by information source and replaced by improved information - see CT code 15901.

IGN53 Mare to WGS 84 (3)

EPSG:15901±2 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Mare
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)	287.58	metre
Y-axis translation(ty)	177.78	metre
Z-axis translation(tz)	-135.41	metre

Parameter values taken from IGN53 Mare to RGNC91-93 (1) (code 15884) assuming that RGNC91-93 is equivalent to WGS 84 to within the accuracy of the transformation.

IGN53 Mare to WGS 84 (2)

EPSG:15783±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Mare
Scope:: Transformation of coordinates at 5m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	287	metre
Y-axis translation(ty)	178	metre
Z-axis translation(tz)	-136	metre

Withdrawn by information source and replaced by improved information from local authority - see tfm code 15901.

Convert EPSG:4641 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4641", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4641 — IGN53 Mare

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

+proj=longlat +ellps=intl +towgs84=287.58,177.78,-135.41,0,0,0,0 +no_defs +type=crs

More about EPSG:4641 →

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 IGN53 Mare 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:4641 →