1、可以利用百度地图web服务或者天地图web服务,得到二维的路径分析的经纬度;
2、利用cesuim地形数据采样接口:sampleTerrain得到高程,然后就有了三维路径分析的坐标信息;
3、然后利用画线的接口,就能完成路径分析;
记录一下sanpleTerrain的用法:
// Query the terrain height of two Cartographic positions
var terrainProvider = Cesium.createWorldTerrain();
var positions = [
Cesium.Cartographic.fromDegrees(86.925145, 27.988257),
Cesium.Cartographic.fromDegrees(87.0, 28.0)
];
var promise = Cesium.sampleTerrain(terrainProvider, 11, positions);
Cesium.when(promise, function(updatedPositions) {
// positions[0].height and positions[1].height have been updated.
// updatedPositions is just a reference to positions.
});