Convert coordinates from Ain el Abd (EPSG:4204) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 6 transformations between Ain el Abd (EPSG:4204) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -145.7 | metre |
| Y-axis translation(ty) | -249.1 | metre |
| Z-axis translation(tz) | 1.5 | metre |
Derived at station K1.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -85.645 | metre |
| Y-axis translation(ty) | -273.077 | metre |
| Z-axis translation(tz) | -79.708 | metre |
| X-axis rotation(rx) | -2.289 | arc-second |
| Y-axis rotation(ry) | 1.421 | arc-second |
| Z-axis rotation(rz) | -2.532 | arc-second |
| Scale difference(ds) | 3.194 | parts per million |
Derivation is more precise, but no evidence that accuracy is better than Ain el Abd to WGS 84 (3). OGP recommends using Ain el Abd to WGS 84 (3).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -202.234 | metre |
| Y-axis translation(ty) | -168.351 | metre |
| Z-axis translation(tz) | -63.51 | metre |
| X-axis rotation(rx) | -3.545 | arc-second |
| Y-axis rotation(ry) | -0.659 | arc-second |
| Z-axis rotation(rz) | 1.945 | arc-second |
| Scale difference(ds) | 2.1 | parts per million |
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -18.944 | metre |
| Y-axis translation(ty) | -379.364 | metre |
| Z-axis translation(tz) | -24.063 | metre |
| X-axis rotation(rx) | -0.04 | arc-second |
| Y-axis rotation(ry) | 0.764 | arc-second |
| Z-axis rotation(rz) | -6.431 | arc-second |
| Scale difference(ds) | 3.657 | parts per million |
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -143 | metre |
| Y-axis translation(ty) | -236 | metre |
| Z-axis translation(tz) | 7 | metre |
Derived at 9 stations. Accuracy 10m in each axis.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -150 | metre |
| Y-axis translation(ty) | -250 | metre |
| Z-axis translation(tz) | -1 | metre |
Derived at 2 stations. Accuracy 25m in each axis.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4204", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude and longitude on an ellipsoid · Area of use: Asia - Middle East - Bahrain, Kuwait and Saudi Arabia
+proj=longlat +ellps=intl +towgs84=-143,-236,7,0,0,0,0 +no_defs +type=crsMore about EPSG:4204 →
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →