Convert coordinates from Yoff (EPSG:4310) 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 2 transformations between Yoff (EPSG:4310) 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) | -30 | metre |
| Y-axis translation(ty) | 190 | metre |
| Z-axis translation(tz) | 89 | metre |
Derived at 7 stations. Accuracy 3m in each axis.
Derived via WGS72. Can be used as a single position vector transformation with parameter values of dX = -37 m, dY = +157 m, dZ = +89.5 m, rX = rY = 0 sec, rZ = 0.554 sec, dS = 0.219 ppm
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4310", "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: Senegal
+proj=longlat +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +no_defs +type=crsMore about EPSG:4310 →
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 →