Convert ST84 Ile des Pins to RGNC91-93

Convert coordinates from ST84 Ile des Pins (EPSG:4642) 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-4642-to-epsg-4749

Official EPSG transformation from ST84 Ile des Pins to RGNC91-93

The EPSG Geodetic Parameter Dataset defines 1 transformation between ST84 Ile des Pins (EPSG:4642) and RGNC91-93 (EPSG:4749). Its parameters, accuracy and area of use are listed below.

ST84 Ile des Pins to RGNC91-93 (1)

EPSG:15893±0.1 m

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

Parameter	Value	Unit
X-axis translation(tx)	244.42	metre
Y-axis translation(ty)	85.352	metre
Z-axis translation(tz)	168.129	metre
X-axis rotation(rx)	8.936	arc-second
Y-axis rotation(ry)	-7.752	arc-second
Z-axis rotation(rz)	-12.5952	arc-second
Scale difference(ds)	14.2723	parts per million

Determined in December 1999.

Convert EPSG:4642 to EPSG:4749 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4642", "EPSG:4749", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4642 — ST84 Ile des Pins

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

+proj=longlat +ellps=intl +towgs84=-13,-348,292,0,0,0,0 +no_defs +type=crs

More about EPSG:4642 →

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 ST84 Ile des Pins 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:4642 →