EPSG systems

EPSG:4803 Lisbon (Lisbon)

Geographic system in latitude and longitude, in use: Portugal - mainland - onshore. Datum, ellipsoid and transformation to WGS 84 below.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:4803
NameLisbon (Lisbon)
TypeGeographic system
Area of use Portugal - mainland - onshore
Bounds W -9,56° · S 36,95° · E -6,19° · N 42,16°
Countries Portugal
DatumLisbon 1937 (Lisbon)
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Prime meridianLisbon -9.131906111111112 degree
Unit degree (Lat north, Lon east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=intl +pm=lisbon +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:4803.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Lisbon_Lisbon",DATUM["Lisbon_1937_(Lisbon)",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Lisbon",-9.13190611111111],UNIT["Degree",0.0174532925199433]]

All systems — Portugal

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