EPSG systems

EPSG:4184 Azores Oriental 1940

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

System record
CodeEPSG:4184
NameAzores Oriental 1940
TypeGeographic system
Area of use Portugal - Azores E - onshore
Portugal - eastern Azores onshore - Sao Miguel, Santa Maria, Formigas.
Bounds W -25,92° · S 36,87° · E -24,72° · N 37,96°
Countries Portugal
DatumAzores Oriental Islands 1940
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Azores Oriental 1940 to WGS 84 (1) (EPSG:1885) — accuracy 44 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=intl +towgs84=-203,141,53 +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:4184.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Azores_Oriental_1940",DATUM["D_Azores_Oriental_Islands_1940",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],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.