EPSG:29101 SAD69 / Brazil Polyconic

Projected system (American Polyconic) in use: Brazil. The full definition below, and conversion in one click.

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System record
Code	EPSG:29101
Name	SAD69 / Brazil Polyconic
Type	Projected system — American Polyconic
Area of use	Brazil Brazil - onshore and offshore. Includes Rocas, Fernando de Noronha archipelago, Trindade, Ihlas Martim Vaz and Sao Pedro e Sao Paulo.
Bounds	W -74,01° · S -35,71° · E -25,28° · N 7,04°
Countries	Brazil
Datum	South American Datum 1969
Ellipsoid	GRS 1967 Modified a = 6378160 m · 1/f = 298.25
Base geographic system	EPSG:4618 — SAD69
Unit	metre (X east, Y north)
Transformation to WGS 84	SAD69 to WGS 84 (16) (EPSG:5882) — accuracy 5 m
Scope	Topographic mapping (small scale).

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	0	degree
Longitude of natural origin	-54	degree
False easting	5000000	metre
False northing	10000000	metre

proj4 definition

+proj=poly +lat_0=0 +lon_0=-54 +x_0=5000000 +y_0=10000000 +ellps=aust_SA +units=m +towgs84=-67.35,3.88,-38.22 +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:29101.

WKT (ESRI format, the .prj content)

PROJCS["SAD_1969_Brazil_Polyconic",GEOGCS["GCS_South_American_1969",DATUM["D_South_American_1969",SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Polyconic"],PARAMETER["False_Easting",5000000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",-54.0],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.

Projection parameters

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — Brazil