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Convert RGFG95 to RGFG95 + NGG1977 height

Convert coordinates from RGFG95 (EPSG:4967) to RGFG95 + NGG1977 height (EPSG:9530) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4967-to-epsg-9530

Official EPSG transformation from RGFG95 to RGFG95 + NGG1977 height

The EPSG Geodetic Parameter Dataset defines 1 transformation between RGFG95 (EPSG:4967) and RGFG95 + NGG1977 height (EPSG:9530). Its parameters, accuracy and area of use are listed below.

RGFG95 to RGFG95 + NGG1977 height (1)

EPSG:9630
Method:
Geog3D to Geog2D+GravityRelatedHeight (IGN1997)
Area of use:
French Guiana - onshore
Scope:
Reversible geoid model transformation.

Grid file: ggguy00.txt

Reversible alternative to RGFG95 to NGG1977 height (1) (code 10011).

Convert EPSG:4967 to EPSG:9530 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4967", "EPSG:9530", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4967 — RGFG95

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

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4967 →

Target: EPSG:9530 — RGFG95 + NGG1977 height

compound horizontal + vertical reference system · Area of use: French Guiana - onshore

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +geoidgrids=fr_ign_ggguy15.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crs
More about EPSG:9530 →

Frequently asked questions

How accurate is converting RGFG95 to RGFG95 + NGG1977 height?
Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift 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:9530 to EPSG:4967 →