EPSG systems

EPSG:31996 SIRGAS 1995 / UTM zone 21S

Projected system (Transverse Mercator) in use: South America - 60°W to 54°W, S hemisphere. The full definition below, and conversion in one click.

Convert coordinates Open in Carte Download the .prj

System record
Code	EPSG:31996
Name	SIRGAS 1995 / UTM zone 21S
Type	Projected system — Transverse Mercator
Area of use	South America - 60°W to 54°W, S hemisphere South America onshore and offshore, southern hemisphere between 60°W and 54°W.
Bounds	W -60,00° · S -44,82° · E -54,00° · N 0,00°
Countries	World
Datum	Sistema de Referencia Geocentrico para America del Sur 1995
Ellipsoid	GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system	EPSG:4170 — SIRGAS 1995
Unit	metre (E east, N north)
Transformation to WGS 84	SIRGAS 1995 to WGS 84 (1) (EPSG:1581) — accuracy 2 m
Scope	Engineering survey, topographic mapping.

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	0	degree
Longitude of natural origin	-57	degree
Scale factor at natural origin	0.9996	unity
False easting	500000	metre
False northing	10000000	metre

proj4 definition

+proj=utm +zone=21 +south +ellps=GRS80 +units=m +towgs84=0,0,0 +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:31996.

WKT (ESRI format, the .prj content)

PROJCS["SIRGAS_UTM_Zone_21S",GEOGCS["GCS_SIRGAS",DATUM["D_SIRGAS",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",-57.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — World

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

Projection parameters

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — World