Convert RGF93 v2 to RGF93 v2b

Convert coordinates from RGF93 v2 (EPSG:9777) to RGF93 v2b (EPSG:9782) — 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-9777-to-epsg-9782

Official EPSG transformation from RGF93 v2 to RGF93 v2b

The EPSG Geodetic Parameter Dataset defines 1 transformation between RGF93 v2 (EPSG:9777) and RGF93 v2b (EPSG:9782). Its parameters, accuracy and area of use are listed below.

RGF93 v2 to RGF93 v2b

EPSG:9788±0.005 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: France
Scope:: Geodesy, engineering survey.

Parameter	Value	Unit
X-axis translation(tx)	-0.017	metre
Y-axis translation(ty)	0.058	metre
Z-axis translation(tz)	0.009	metre
X-axis rotation(rx)	0.001305	arc-second
Y-axis rotation(ry)	0.00068	arc-second
Z-axis rotation(rz)	-0.001467	arc-second
Scale difference(ds)	-0.00072	parts per million

Derived at 465 permanent GNSS stations. In use from 2021-01-05.

Convert EPSG:9777 to EPSG:9782 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9777", "EPSG:9782", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:9777 — RGF93 v2

geographic system using latitude and longitude on an ellipsoid · Area of use: France

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:9777 →

Target: EPSG:9782 — RGF93 v2b

geographic system using latitude and longitude on an ellipsoid · Area of use: France

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:9782 →

Frequently asked questions

How accurate is converting RGF93 v2 to RGF93 v2b?: The most accurate official EPSG transformation between these systems is accurate to about ±0.005 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:9782 to EPSG:9777 →