EPSG systems

EPSG:4231 ED87

Geographic system in latitude and longitude, in use: Europe - west. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4231
NameED87
TypeGeographic system
Area of use Europe - west
Bounds W -10,56° · S 34,88° · E 38,01° · N 84,73°
Countries World
DatumEuropean Datum 1987
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Unit degree (Lat north, Lon east)
Transformation to WGS 84 ED87 to WGS 84 (2) (EPSG:3905) — accuracy 1 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.005693,-0.044698,0.044285,0.1218 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:4231.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_European_1987",DATUM["D_European_1987",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — World

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.