国家2000大地坐标系CGCS2000（EPSG4490和EPSG4479）参数

EPSG：4490

China Geodetic Coordinate System 2000 (CGCS2000)经纬度坐标系

Unit: degree (supplier to define representation)

Geodetic CRS: China Geodetic Coordinate System 2000

Datum: China 2000

Ellipsoid: CGCS2000

Prime meridian: Greenwich

Data source: OGP

Information source: EPSG. See 3D CRS for original information source.

Revision date: 2012-01-05

Scope: Horizontal component of 3D system.

Remarks: Adopted July 2008. Replaces Xian 1980 (CRS code 4610).

Area of use: China - onshore and offshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

Center coordinates
104.19500000 35.13000000

WGS84 bounds:
73.62 16.7
134.77 53.56

Well Known Text (WKT)：

GEOGCS["China Geodetic Coordinate System 2000",
    DATUM["China_2000",
        SPHEROID["CGCS2000",6378137,298.257222101,
            AUTHORITY["EPSG","1024"]],
        AUTHORITY["EPSG","1043"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4490"]]

EPSG：4479

China Geodetic Coordinate System 2000 (CGCS2000)平面坐标系

Unit: metre

Geodetic CRS: China Geodetic Coordinate System 2000

Datum: China 2000

Ellipsoid: CGCS2000

Prime meridian: Greenwich

Data source: OGP

Information source: Chinese Academy of Surveying and Mapping.

Revision date: 2012-01-05

Scope: Geodetic survey.

Area of use: China - onshore and offshore.

Coordinate system: Earth centred, earth fixed, righthanded 3D coordinate system, consisting of 3 orthogonal axes with X and Y axes in the equatorial plane, positive Z-axis parallel to mean earth rotation axis and pointing towards North Pole. UoM: m.

Center coordinates
-1280587.98 5062692.16

Projected bounds:
1723289.26 5862789.57
-2673890.41 2695444.42

WGS84 bounds:
73.62 16.7
134.77 53.56

Well Known Text (WKT)：

GEOCCS["China Geodetic Coordinate System 2000",
    DATUM["China_2000",
        SPHEROID["CGCS2000",6378137,298.257222101,
            AUTHORITY["EPSG","1024"]],
        AUTHORITY["EPSG","1043"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Geocentric X",OTHER],
    AXIS["Geocentric Y",OTHER],
    AXIS["Geocentric Z",NORTH],
    AUTHORITY["EPSG","4479"]]

参考：

1、http://epsg.io/4490 

2、https://epsg.io/4479