EPSG:4521 CGCS2000 / 3-degree Gauss-Kruger zone 33
Projected system (Transverse Mercator) in use: China - 97.5°E to 100.5°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:4521 |
|---|---|
| Name | CGCS2000 / 3-degree Gauss-Kruger zone 33 |
| Type | Projected system — Transverse Mercator |
| Area of use |
China - 97.5°E to 100.5°E China - between 97°30'E and 100°30'E. |
| Bounds | W 97,50° · S 21,43° · E 100,50° · N 42,76° |
| 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 | Cadastre, engineering survey, topographic mapping (large scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | 99 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 33500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=99 +k=1 +x_0=33500000 +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:4521.
WKT (ESRI format, the .prj content)
PROJCS["CGCS2000_3_Degree_GK_Zone_33",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",33500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",99.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — China
- EPSG:4512CGCS2000 / Gauss-Kruger CM 135E
- EPSG:4513CGCS2000 / 3-degree Gauss-Kruger zone 25
- EPSG:4514CGCS2000 / 3-degree Gauss-Kruger zone 26
- EPSG:4515CGCS2000 / 3-degree Gauss-Kruger zone 27
- EPSG:4516CGCS2000 / 3-degree Gauss-Kruger zone 28
- EPSG:4517CGCS2000 / 3-degree Gauss-Kruger zone 29
- EPSG:4518CGCS2000 / 3-degree Gauss-Kruger zone 30
- EPSG:4519CGCS2000 / 3-degree Gauss-Kruger zone 31
- EPSG:4520CGCS2000 / 3-degree Gauss-Kruger zone 32
- EPSG:4522CGCS2000 / 3-degree Gauss-Kruger zone 34
- EPSG:4523CGCS2000 / 3-degree Gauss-Kruger zone 35
- EPSG:4524CGCS2000 / 3-degree Gauss-Kruger zone 36
- EPSG:4525CGCS2000 / 3-degree Gauss-Kruger zone 37
- EPSG:4526CGCS2000 / 3-degree Gauss-Kruger zone 38
- EPSG:4527CGCS2000 / 3-degree Gauss-Kruger zone 39
- EPSG:4528CGCS2000 / 3-degree Gauss-Kruger zone 40
- EPSG:4529CGCS2000 / 3-degree Gauss-Kruger zone 41
- EPSG:4530CGCS2000 / 3-degree Gauss-Kruger zone 42
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.