EPSG:4503 CGCS2000 / Gauss-Kruger CM 81E
Projected system (Transverse Mercator) in use: China - 78°E to 84°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:4503 |
|---|---|
| Name | CGCS2000 / Gauss-Kruger CM 81E |
| Type | Projected system — Transverse Mercator |
| Area of use |
China - 78°E to 84°E China - between 78°E and 84°E. |
| Bounds | W 77,98° · S 29,16° · E 84,00° · N 47,23° |
| Countries | China |
| Datum | China 2000 |
| Ellipsoid | CGCS2000 a = 6378137 m · 1/f = 298.257222101 |
| Base geographic system | EPSG:4490 — China Geodetic Coordinate System 2000 |
| 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 | 81 | 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=81 +k=1 +x_0=500000 +y_0=0 +ellps=GRS80 +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:4503.
WKT (ESRI format, the .prj content)
PROJCS["CGCS2000_GK_CM_81E",GEOGCS["GCS_China_Geodetic_Coordinate_System_2000",DATUM["D_China_2000",SPHEROID["CGCS2000",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Gauss_Kruger"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",81.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — China
- EPSG:4494CGCS2000 / Gauss-Kruger zone 16
- EPSG:4495CGCS2000 / Gauss-Kruger zone 17
- EPSG:4496CGCS2000 / Gauss-Kruger zone 18
- EPSG:4497CGCS2000 / Gauss-Kruger zone 19
- EPSG:4498CGCS2000 / Gauss-Kruger zone 20
- EPSG:4499CGCS2000 / Gauss-Kruger zone 21
- EPSG:4500CGCS2000 / Gauss-Kruger zone 22
- EPSG:4501CGCS2000 / Gauss-Kruger zone 23
- EPSG:4502CGCS2000 / Gauss-Kruger CM 75E
- EPSG:4504CGCS2000 / Gauss-Kruger CM 87E
- EPSG:4505CGCS2000 / Gauss-Kruger CM 93E
- EPSG:4506CGCS2000 / Gauss-Kruger CM 99E
- EPSG:4507CGCS2000 / Gauss-Kruger CM 105E
- EPSG:4508CGCS2000 / Gauss-Kruger CM 111E
- EPSG:4509CGCS2000 / Gauss-Kruger CM 117E
- EPSG:4510CGCS2000 / Gauss-Kruger CM 123E
- EPSG:4511CGCS2000 / Gauss-Kruger CM 129E
- EPSG:4512CGCS2000 / Gauss-Kruger CM 135E
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.