EPSG systems

EPSG:2432 Beijing 1954 / 3-degree Gauss-Kruger CM 105E

Projected system (Transverse Mercator) in use: China - 103.5°E to 106.5°E. 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:2432
NameBeijing 1954 / 3-degree Gauss-Kruger CM 105E
TypeProjected system — Transverse Mercator
Area of use China - 103.5°E to 106.5°E
China - between 103°30'E and 106°30'E.
Bounds W 103,50° · S 22,50° · E 106,51° · N 42,21°
Countries China
DatumBeijing 1954
Ellipsoid Krassowsky 1940 a = 6378245 m · 1/f = 298.3
Base geographic system EPSG:4214 — Beijing 1954
Unit metre (X north, Y east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeCadastre, engineering survey, topographic mapping (large scale).

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin105degree
Scale factor at natural origin1unity
False easting500000metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=0 +lon_0=105 +k=1 +x_0=500000 +y_0=0 +ellps=krass +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:2432.

WKT (ESRI format, the .prj content)

PROJCS["Beijing_1954_3_Degree_GK_CM_105E",GEOGCS["GCS_Beijing_1954",DATUM["D_Beijing_1954",SPHEROID["Krasovsky_1940",6378245.0,298.3]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Gauss_Kruger"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",105.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — China

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