EPSG Library · Americas and Asia-Pacific

EPSG:4490 — China Geodetic Coordinate System 2000

Source: EPSG Dataset via PROJ 9.5.1 · Updated 2026-10-05

Summary

EPSG:4490 (China Geodetic Coordinate System 2000) is a geographic 2D coordinate reference system on the China 2000 datum with coordinates in degrees. Area of use: China - onshore and offshore.

Type: geographic 2D
Datum: China 2000
Units: degree
Axes: Lat, Lon

Definition

EPSG:4490 as published in the EPSG Dataset (PROJ 9.5.1).
Property	Value
EPSG code	EPSG:4490
Name	China Geodetic Coordinate System 2000
Type	Geographic 2d CRS
Datum	China 2000
Ellipsoid	CGCS2000 (a = 6,378,137.000 m, 1/f = 298.257222)
Prime meridian	Greenwich
Axes	Geodetic latitude (Lat, north, degree); Geodetic longitude (Lon, east, degree)
Scope	Horizontal component of 3D system.
Bounding box	73.62° to 134.77° longitude, 16.7° to 53.56° latitude

Area of use

China - onshore and offshore.

Example coordinates

A WGS 84 point at longitude 104.195°, latitude 35.13° (inside the area of use) has these coordinates in EPSG:4490:

Computed with PROJ using the EPSG default operation: axis order change (2D) + Ballpark geographic offset from WGS 84 to China Geodetic Coordinate System 2000 + axis order change (2D).
Axis	Value	Unit
Longitude	104.195000	°
Latitude	35.130000	°

Open this conversion in the coordinate converter

Definitions and downloads

PROJ string

+proj=longlat +ellps=GRS80 +no_defs +type=crs

A PROJ string cannot carry every EPSG detail (axis order, datum ensemble, transformations). Prefer WKT2 or the EPSG code itself.

Proj4js definition used by the converter

+proj=longlat +ellps=GRS80 +no_defs

No datum shift is needed: this CRS is on WGS 84 or a datum Proj4js treats as equivalent at the metre level.

WKT2:2019

GEOGCRS["China Geodetic Coordinate System 2000", DATUM["China 2000", ELLIPSOID["CGCS2000",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Horizontal component of 3D system."], AREA["China - onshore and offshore."], BBOX[16.7,73.62,53.56,134.77]], ID["EPSG",4490]]

Downloads

4490.prj — ESRI WKT for shapefiles
4490.wkt — OGC WKT2:2019

FAQ

What is EPSG:4490?

EPSG:4490 (China Geodetic Coordinate System 2000) is a geographic 2D coordinate reference system on the China 2000 datum with coordinates in degrees. Area of use: China - onshore and offshore.

Where can EPSG:4490 be used?

Its area of use is: China - onshore and offshore.

What is the axis order of EPSG:4490?

By the EPSG definition: Geodetic latitude, Geodetic longitude. Many GIS formats such as GeoJSON and KML store longitude first instead.

Coordinate systems

Articles

Axis orderKnowledge Center

Tools

References

IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_4490.
PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:4490 — China Geodetic Coordinate System 2000.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/4490/