Convert coordinates from ED87 (EPSG:4231) 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 ED87 (EPSG:4231) 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) | -82.981 | metre |
| Y-axis translation(ty) | -99.719 | metre |
| Z-axis translation(tz) | -110.709 | metre |
| X-axis rotation(rx) | -0.5076 | microradian |
| Y-axis rotation(ry) | 0.1503 | microradian |
| Z-axis rotation(rz) | 0.3898 | microradian |
| Scale difference(ds) | -0.3143 | parts per million |
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -83.11 | metre |
| Y-axis translation(ty) | -97.38 | metre |
| Z-axis translation(tz) | -117.22 | metre |
| X-axis rotation(rx) | 0.0276 | microradian |
| Y-axis rotation(ry) | -0.2167 | microradian |
| Z-axis rotation(rz) | 0.2147 | microradian |
| Scale difference(ds) | 0.1218 | parts per million |
Parameter values taken from ED87 to ETRS89 (1) (tfm code 4078) assuming that ETRS89 is coincident with WGS 84 within the accuracy of the transformation. Used as a tfm between ED50 and WGS 84 - see code 3904.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4231", "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: Europe - west
+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.00569290865241986,-0.0446975835137458,0.0442850539012516,0.1218 +no_defs +type=crsMore about EPSG:4231 →
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 →