开源cesium加载cgcs2000

proj4js 坐标转换

  1. import { default as proj4 } from 'proj4'
  2. Cesium.GeoJsonDataSource.crsNames['urn:ogc:def:crs:EPSG::4490'] =
  3.   Cesium.GeoJsonDataSource.crsNames['EPSG:4490'] = function (coordinates) {
  4.     const fromProjection = `GEOGCS["China Geodetic Coordinate System 2000", 
  5.       DATUM["China 2000", 
  6.         SPHEROID["CGCS2000", 6378137.0, 298.257222101, AUTHORITY["EPSG","1024"]], 
  7.         AUTHORITY["EPSG","1043"]], 
  8.       PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], 
  9.       UNIT["degree", 0.017453292519943295], 
  10.       AXIS["Geodetic longitude", EAST], 
  11.       AXIS["Geodetic latitude", NORTH], 
  12.       AUTHORITY["EPSG","4490"]]`
  13.     const toProjection = `GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],
  14.           AUTHORITY["EPSG", "6326"]], PRIMEM["Greenwich", 0, AUTHORITY["EPSG", "8901"]],
  15.           UNIT["degree", 0.0174532925199433, AUTHORITY["EPSG", "9122"]], AUTHORITY["EPSG", "4326"]]`
  17.     const x = coordinates[0]
  18.     const y = coordinates[1]
  19.     const newCoordinates = proj4(fromProjection, toProjection, [x, y])
  20.     return Cesium.Cartesian3.fromDegrees(
  21.       newCoordinates[0],
  22.       newCoordinates[1],
  23.       0
  24.     )
  25.   }

`

https://www.cnblogs.com/dog2016/p/14960186.html)

关于加载CGCS2000切片

cesium加载cgcs2000\wgs84坐标系解决方式