EPSG:4530 CGCS2000 / 3-degree Gauss-Kruger zone 42
Projected system (Transverse Mercator) in use: China - 124.5°E to 127.5°E onshore. 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:4530 |
|---|---|
| Name | CGCS2000 / 3-degree Gauss-Kruger zone 42 |
| Type | Projected system — Transverse Mercator |
| Area of use |
China - 124.5°E to 127.5°E onshore China - onshore between 124°30'E and 127°30'E. |
| Bounds | W 124,50° · S 40,19° · E 127,50° · N 53,20° |
| 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 | 126 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 42500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=126 +k=1 +x_0=42500000 +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:4530.
WKT (ESRI format, the .prj content)
PROJCS["CGCS2000_3_Degree_GK_Zone_42",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",42500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",126.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — China
- EPSG:4521CGCS2000 / 3-degree Gauss-Kruger zone 33
- 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:4531CGCS2000 / 3-degree Gauss-Kruger zone 43
- EPSG:4532CGCS2000 / 3-degree Gauss-Kruger zone 44
- EPSG:4533CGCS2000 / 3-degree Gauss-Kruger zone 45
- EPSG:4534CGCS2000 / 3-degree Gauss-Kruger CM 75E
- EPSG:4535CGCS2000 / 3-degree Gauss-Kruger CM 78E
- EPSG:4536CGCS2000 / 3-degree Gauss-Kruger CM 81E
- EPSG:4537CGCS2000 / 3-degree Gauss-Kruger CM 84E
- EPSG:4538CGCS2000 / 3-degree Gauss-Kruger CM 87E
- EPSG:4539CGCS2000 / 3-degree Gauss-Kruger CM 90E
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.