Convert IGN53 Mare to RGNC91-93

Convert coordinates from IGN53 Mare (EPSG:4641) to RGNC91-93 (EPSG:4749) — 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-4749

Official EPSG transformations from IGN53 Mare to RGNC91-93

The EPSG Geodetic Parameter Dataset defines 2 transformations between IGN53 Mare (EPSG:4641) and RGNC91-93 (EPSG:4749). Each applies to a specific area — pick the one whose area of use covers your data.

IGN53 Mare to RGNC91-93 (2)

EPSG:15891±0.1 mBest accuracy

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: New Caledonia - Mare
Scope:: Transformation of coordinates at 0.1m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	-408.809	metre
Y-axis translation(ty)	366.857	metre
Z-axis translation(tz)	-412.987	metre
X-axis rotation(rx)	-1.8843	arc-second
Y-axis rotation(ry)	0.5308	arc-second
Z-axis rotation(rz)	-2.1657	arc-second
Scale difference(ds)	-121.0994	parts per million

Determined in April 1993, modified in December 1999.

IGN53 Mare to RGNC91-93 (1)

EPSG:15884±2 m

Method:: Geocentric translations (geog2D domain)
Area of use:: New Caledonia - Mare
Scope:: Transformation of coordinates at 2m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	287.58	metre
Y-axis translation(ty)	177.78	metre
Z-axis translation(tz)	-135.41	metre

Determined in April 1993, modified in December 1999. May be taken as approximate transformation to WGS 84: see IGN53 Mare to WGS 84 (3) (code 15901).

Convert EPSG:4641 to EPSG:4749 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4641", "EPSG:4749", 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: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 IGN53 Mare 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:4641 →