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Convert RGF93 v2 to RGF93 v2 + NGF-IGN78 height

Convert coordinates from RGF93 v2 (EPSG:9776) to RGF93 v2 + NGF-IGN78 height (EPSG:9539) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-9776-to-epsg-9539

Official EPSG transformation from RGF93 v2 to RGF93 v2 + NGF-IGN78 height

The EPSG Geodetic Parameter Dataset defines 1 transformation between RGF93 v2 (EPSG:9776) and RGF93 v2 + NGF-IGN78 height (EPSG:9539). Its parameters, accuracy and area of use are listed below.

RGF93 v2 to RGF93 v2 + NGF-IGN78 height (2)

EPSG:9639±0.05 m
Method:
Geog3D to Geog2D+GravityRelatedHeight (IGN2009)
Area of use:
France - Corsica onshore
Scope:
Reversible geoid model transformation.

Grid file: RAC09.mnt

Reversible alternative to RGF93 v2 to NGF-IGN78 height (2) (code 8372).

Convert EPSG:9776 to EPSG:9539 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9776", "EPSG:9539", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:9776 — RGF93 v2

geographic system using latitude, longitude and ellipsoidal height · Area of use: France

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:9776 →

Target: EPSG:9539 — RGF93 v2 + NGF-IGN78 height

compound horizontal + vertical reference system · Area of use: France - Corsica onshore

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +vunits=m +no_defs +type=crs
More about EPSG:9539 →

Frequently asked questions

How accurate is converting RGF93 v2 to RGF93 v2 + NGF-IGN78 height?
The most accurate official EPSG transformation between these systems is accurate to about ±0.05 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:9539 to EPSG:9776 →