EPSG:21423 Beijing 1954 / Gauss-Kruger zone 23
Projected system (Transverse Mercator) in use: China - east of 132°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.
| Code | EPSG:21423 |
|---|---|
| Name | Beijing 1954 / Gauss-Kruger zone 23 |
| Type | Projected system — Transverse Mercator |
| Area of use | China - east of 132°E |
| Bounds | W 132,00° · S 45,02° · E 134,77° · N 48,40° |
| Countries | China |
| Datum | Beijing 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) |
| Scope | Topographic mapping (medium scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | 135 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 23500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=135 +k=1 +x_0=23500000 +y_0=0 +ellps=krass +units=m +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:21423.
WKT (ESRI format, the .prj content)
PROJCS["Beijing_1954_GK_Zone_23",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",23500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",135.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — China
- EPSG:21413Beijing 1954 / Gauss-Kruger zone 13
- EPSG:21414Beijing 1954 / Gauss-Kruger zone 14
- EPSG:21415Beijing 1954 / Gauss-Kruger zone 15
- EPSG:21416Beijing 1954 / Gauss-Kruger zone 16
- EPSG:21417Beijing 1954 / Gauss-Kruger zone 17
- EPSG:21418Beijing 1954 / Gauss-Kruger zone 18
- EPSG:21419Beijing 1954 / Gauss-Kruger zone 19
- EPSG:21420Beijing 1954 / Gauss-Kruger zone 20
- EPSG:21421Beijing 1954 / Gauss-Kruger zone 21
- EPSG:21422Beijing 1954 / Gauss-Kruger zone 22
- EPSG:21453Beijing 1954 / Gauss-Kruger CM 75E
- EPSG:21454Beijing 1954 / Gauss-Kruger CM 81E
- EPSG:21455Beijing 1954 / Gauss-Kruger CM 87E
- EPSG:21456Beijing 1954 / Gauss-Kruger CM 93E
- EPSG:21457Beijing 1954 / Gauss-Kruger CM 99E
- EPSG:21458Beijing 1954 / Gauss-Kruger CM 105E
- EPSG:21459Beijing 1954 / Gauss-Kruger CM 111E
- EPSG:21460Beijing 1954 / Gauss-Kruger CM 117E
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.