Source: EPSG:4326 — WGS 84
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 →
Convert EPSG:4326 to EPSG:4231
Online coordinate converter from WGS 84 (EPSG:4326) to ED87 (EPSG:4231). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
The EPSG dataset defines official transformation parameters for the reverse direction. See ED87 to WGS 84 — the parameters are invertible.
Convert EPSG:4326 to EPSG:4231 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4326", "EPSG:4231", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: 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=crsMore about EPSG:4231 →
Frequently asked questions
- How accurate is converting WGS 84 to ED87?
- Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift 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.