EPSG systems

EPSG:24891 PSAD56 / Peru west zone

Projected system (Transverse Mercator) in use: Peru - west of 79°W. The full definition below, and conversion in one click.

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System record
Code	EPSG:24891
Name	PSAD56 / Peru west zone
Type	Projected system — Transverse Mercator
Area of use	Peru - west of 79°W
Bounds	W -81,41° · S -8,32° · E -79,00° · N -3,38°
Countries	Peru
Datum	Provisional South American Datum 1956
Ellipsoid	International 1924 a = 6378388 m · 1/f = 297
Base geographic system	EPSG:4248 — PSAD56
Unit	metre (X east, Y north)
Transformation to WGS 84	PSAD56 to WGS 84 (8) (EPSG:1208) — accuracy 16 m
Scope	Engineering survey, topographic mapping.

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	-6	degree
Longitude of natural origin	-80.5	degree
Scale factor at natural origin	0.99983008	unity
False easting	222000	metre
False northing	1426834.743	metre

proj4 definition

+proj=tmerc +lat_0=-6 +lon_0=-80.5 +k=0.99983008 +x_0=222000 +y_0=1426834.743 +ellps=intl +units=m +towgs84=-279,175,-379 +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:24891.

WKT (ESRI format, the .prj content)

PROJCS["Peru_West_Zone",GEOGCS["GCS_Provisional_S_American_1956",DATUM["D_Provisional_S_American_1956",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",222000.0],PARAMETER["False_Northing",1426834.743],PARAMETER["Central_Meridian",-80.5],PARAMETER["Scale_Factor",0.99983008],PARAMETER["Latitude_Of_Origin",-6.0],UNIT["Meter",1.0]]

All systems — Peru

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 — Peru