EPSG:4490 China Geodetic Coordinate System 2000

Geographic system in latitude and longitude, in use: China. Datum, ellipsoid and transformation to WGS 84 below.

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.

Convert coordinates Open in Carte Download the .prj

System record
Code	EPSG:4490
Name	China Geodetic Coordinate System 2000
Type	Geographic system
Area of use	China China - onshore and offshore.
Bounds	W 73,62° · S 16,70° · E 134,77° · N 53,56°
Countries	China
Datum	China 2000
Ellipsoid	CGCS2000 a = 6378137 m · 1/f = 298.257222101
Unit	degree (Lat north, Lon east)
Transformation to WGS 84	No simple transformation published (ellipsoid alone)
Scope	Horizontal component of 3D system.

proj4 definition

+proj=longlat +ellps=GRS80 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:4490.

WKT (ESRI format, the .prj content)

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]]

All systems — China

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — China