Convert ED87 to ETRS89

Convert coordinates from ED87 (EPSG:4231) to ETRS89 (EPSG:4258) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4231-to-epsg-4258

Official EPSG transformation from ED87 to ETRS89

The EPSG Geodetic Parameter Dataset defines 1 transformation between ED87 (EPSG:4231) and ETRS89 (EPSG:4258). Its parameters, accuracy and area of use are listed below.

ED87 to ETRS89 (1)

EPSG:4078±0.3 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: Europe - west
Scope:: Geodesy.

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

May be used as a transformation between ED87 and WGS 84 - see tfm code 3905.

Convert EPSG:4231 to EPSG:4258 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4231", "EPSG:4258", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4231 — ED87

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=crs

More about EPSG:4231 →

Target: EPSG:4258 — ETRS89

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - ETRF by country

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:4258 →

Frequently asked questions

How accurate is converting ED87 to ETRS89?: The most accurate official EPSG transformation between these systems is accurate to about ±0.3 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:4258 to EPSG:4231 →