Convert Abidjan 1987 to WGS 84

Convert coordinates from Abidjan 1987 (EPSG:4143) to WGS 84 (EPSG:4326) — 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-4143-to-epsg-4326

Official EPSG transformations from Abidjan 1987 to WGS 84

The EPSG Geodetic Parameter Dataset defines 2 transformations between Abidjan 1987 (EPSG:4143) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Abidjan 1987 to WGS 84 (1)

EPSG:1470±2 mBest accuracy

Method:: Geocentric translations (geog2D domain)
Area of use:: Cote d'Ivoire (Ivory Coast)
Scope:: Oil and gas exploration.

Parameter	Value	Unit
X-axis translation(tx)	-124.76	metre
Y-axis translation(ty)	53	metre
Z-axis translation(tz)	466.79	metre

Derived in Abidjan for use in the immediate area, but used by E&P industry onshore and offshore. Accuracy is submetre in Abidjan but unknown elsewhere. A similar CT (tfm code 6872) was used by Western Geophysical for offshore surveys in the 1990s.

Abidjan 1987 to WGS 84 (2)

EPSG:6872±2 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Cote d'Ivoire (Ivory Coast) - offshore
Scope:: Oil and gas exploration.

Parameter	Value	Unit
X-axis translation(tx)	-123.1	metre
Y-axis translation(ty)	53.2	metre
Z-axis translation(tz)	465.4	metre

Derived and used by Western Geophysical for offshore surveys in the 1990s, but exact provenance uncertain. Used by OMV.

Convert EPSG:4143 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4143", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4143 — Abidjan 1987

geographic system using latitude and longitude on an ellipsoid · Area of use: Cote d'Ivoire (Ivory Coast)

+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=-124.76,53,466.79,0,0,0,0 +no_defs +type=crs

More about EPSG:4143 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting Abidjan 1987 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±2 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:4326 to EPSG:4143 →