Skip to content
transform

Convert Accra to WGS 84

Convert coordinates from Accra (EPSG:4168) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4168-to-epsg-4326

Official EPSG transformations from Accra to WGS 84

The EPSG Geodetic Parameter Dataset defines 4 transformations between Accra (EPSG:4168) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Accra to WGS 84 (4)

EPSG:6896±6 mBest accuracy
Method:
Geocentric translations (geog2D domain)
Area of use:
Ghana - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-170metre
Y-axis translation(ty)33metre
Z-axis translation(tz)326metre

Derived at 4 stations. Accuracy 3m, 4m and 3m in X, Y and Z axes.

Accra to WGS 84 (1)

EPSG:1569±25 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Ghana
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-199metre
Y-axis translation(ty)32metre
Z-axis translation(tz)322metre

Derived at 3 common points.

Accra to WGS 84 (3)

EPSG:15495±25 m
Method:
Position Vector transformation (geog2D domain)
Area of use:
Ghana - offshore
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-171.16metre
Y-axis translation(ty)17.29metre
Z-axis translation(tz)325.21metre
X-axis rotation(rx)0arc-second
Y-axis rotation(ry)0arc-second
Z-axis rotation(rz)0.814arc-second
Scale difference(ds)-0.38parts per million

Derived via WGS 72BE. Found in use within oil industry erroneously concatenated via WGS 72. See tfm code 8571.

Accra to WGS 84 (2)

EPSG:8571±26 m
Method:
Concatenated operation
Area of use:
Ghana - offshore
Scope:
Oil and gas exploration and production.
  1. Accra to WGS 72BE (1) (null)
  2. WGS 72BE to WGS 84 (1) (null)

Can be implemented as a position vector tfm dX=-171.16 dY=17.29 dZ=325.21m, rX=rY=0 rZ=0.814", dS=-0.38 ppm. See tfm code 15495. Found in use within oil industry erroneously concatenated as dX=-171.16 dY=17.29 dZ=327.81m, rX=rY0 rZ=0.554", dS=0.2263 ppm.

Convert EPSG:4168 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4168", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4168 — Accra

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

+proj=longlat +a=6378300 +rf=296 +towgs84=-199,32,322,0,0,0,0 +no_defs +type=crs
More about EPSG:4168 →

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 Accra to WGS 84?
The most accurate official EPSG transformation between these systems is accurate to about ±6 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:4168 →