EPSG:4791 New Beijing / 3-degree Gauss-Kruger CM 102E
Projected system (Transverse Mercator) in use: China - 100.5°E to 103.5°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.
| Code | EPSG:4791 |
|---|---|
| Name | New Beijing / 3-degree Gauss-Kruger CM 102E |
| Type | Projected system — Transverse Mercator |
| Area of use |
China - 100.5°E to 103.5°E China - between 100°30'E and 103°30'E. |
| Bounds | W 100,50° · S 21,13° · E 103,50° · N 42,69° |
| Countries | China |
| Datum | New Beijing |
| Ellipsoid | Krassowsky 1940 a = 6378245 m · 1/f = 298.3 |
| Base geographic system | EPSG:4555 — New Beijing |
| Unit | metre (X north, Y east) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Cadastre, engineering survey, topographic mapping (large scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | 102 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=102 +k=1 +x_0=500000 +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:4791.
WKT (ESRI format, the .prj content)
PROJCS["New_Beijing_3_Degree_Gauss_Kruger_CM_102E",GEOGCS["GCS_New_Beijing",DATUM["D_New_Beijing",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",102.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — China
- EPSG:4782New Beijing / 3-degree Gauss-Kruger CM 75E
- EPSG:4783New Beijing / 3-degree Gauss-Kruger CM 78E
- EPSG:4784New Beijing / 3-degree Gauss-Kruger CM 81E
- EPSG:4785New Beijing / 3-degree Gauss-Kruger CM 84E
- EPSG:4786New Beijing / 3-degree Gauss-Kruger CM 87E
- EPSG:4787New Beijing / 3-degree Gauss-Kruger CM 90E
- EPSG:4788New Beijing / 3-degree Gauss-Kruger CM 93E
- EPSG:4789New Beijing / 3-degree Gauss-Kruger CM 96E
- EPSG:4790New Beijing / 3-degree Gauss-Kruger CM 99E
- EPSG:4792New Beijing / 3-degree Gauss-Kruger CM 105E
- EPSG:4793New Beijing / 3-degree Gauss-Kruger CM 108E
- EPSG:4794New Beijing / 3-degree Gauss-Kruger CM 111E
- EPSG:4795New Beijing / 3-degree Gauss-Kruger CM 114E
- EPSG:4796New Beijing / 3-degree Gauss-Kruger CM 117E
- EPSG:4797New Beijing / 3-degree Gauss-Kruger CM 120E
- EPSG:4798New Beijing / 3-degree Gauss-Kruger CM 123E
- EPSG:4799New Beijing / 3-degree Gauss-Kruger CM 126E
- EPSG:4800New Beijing / 3-degree Gauss-Kruger CM 129E
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.