Convert coordinates from ED50 (EPSG:4230) to ED87 (EPSG:4231) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 1 transformation between ED50 (EPSG:4230) and ED87 (EPSG:4231). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -1.51 | metre |
| Y-axis translation(ty) | -0.84 | metre |
| Z-axis translation(tz) | -3.5 | metre |
| X-axis rotation(rx) | -1.893 | microradian |
| Y-axis rotation(ry) | -0.687 | microradian |
| Z-axis rotation(rz) | -2.764 | microradian |
| Scale difference(ds) | 0.609 | parts per million |
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4230", "EPSG:4231", 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 - ED50 by country
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4230 →
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 →