基于cesuim三维框架开发的三维路径分析的实现「建议收藏」

// 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.
});