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Convert ST87 Ouvea to RGNC91-93

Convert coordinates from ST87 Ouvea (EPSG:4750) 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-4750-to-epsg-4749

Official EPSG transformations from ST87 Ouvea to RGNC91-93

The EPSG Geodetic Parameter Dataset defines 2 transformations between ST87 Ouvea (EPSG:4750) and RGNC91-93 (EPSG:4749). Each applies to a specific area — pick the one whose area of use covers your data.

ST87 Ouvea to RGNC91-93 (2)

EPSG:15892±0.1 mBest accuracy
Method:
Coordinate Frame rotation (geog2D domain)
Area of use:
New Caledonia - Ouvea
Scope:
Transformation of coordinates at 0.1m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-122.386metre
Y-axis translation(ty)-188.707metre
Z-axis translation(tz)103.334metre
X-axis rotation(rx)-3.511arc-second
Y-axis rotation(ry)4.9665arc-second
Z-axis rotation(rz)5.7048arc-second
Scale difference(ds)4.4799parts per million

Determined in December 1999.

ST87 Ouvea to RGNC91-93 (1)

EPSG:15885±0.5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
New Caledonia - Ouvea
Scope:
Transformation of coordinates at 0.5m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-56.263metre
Y-axis translation(ty)16.136metre
Z-axis translation(tz)-22.856metre

Determined in December 1999. May be used as approximate transformation to WGS 84 - see ST87 Ouvea to WGS 84 (2) (code 15881).

Convert EPSG:4750 to EPSG:4749 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4750", "EPSG:4749", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4750 — ST87 Ouvea

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

+proj=longlat +ellps=WGS84 +towgs84=-56.263,16.136,-22.856,0,0,0,0 +no_defs +type=crs
More about EPSG:4750 →

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 ST87 Ouvea 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:4750 →