EPSG systems

EPSG:5538 Corrego Alegre 1961 / UTM zone 23S

Projected system (Transverse Mercator) in use: Brazil - 48°W to 42°W and south of 15°S. The full definition below, and conversion in one click.

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:5538
NameCorrego Alegre 1961 / UTM zone 23S
TypeProjected system — Transverse Mercator
Area of use Brazil - 48°W to 42°W and south of 15°S
Brazil - onshore between 48°W and 42°W and south of 15°S.
Bounds W -48,00° · S -25,29° · E -42,00° · N -15,00°
Countries Brazil
DatumCorrego Alegre 1961
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Base geographic system EPSG:5524 — Corrego Alegre 1961
Unit metre (E east, N north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin-45degree
Scale factor at natural origin0.9996unity
False easting500000metre
False northing10000000metre

proj4 definition

+proj=utm +zone=23 +south +ellps=intl +units=m +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:5538.

WKT (ESRI format, the .prj content)

PROJCS["Corrego_Alegre_1961_UTM_Zone_23S",GEOGCS["GCS_Corrego_Alegre_1961",DATUM["D_Corrego_Alegre_1961",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",-45.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Brazil

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