Cesium(很简单很简单的部分)

没来得及时间总结，等忙完再总结~~~发着放这里，占个坑~

需要数据：WGS84的GeoJson数据

shp转GeoJson：QGIS可以转换

Cesium加载GeoJson数据（两种写法都可以）：

 /**
     加载.geoJson文件----------------------------------------------------------------------------------------------------
     */
    viewer.dataSources.add(Cesium.GeoJsonDataSource.load('/officalCesium/Apps/baseData/guojiexian.geojson',{
        stroke: Cesium.Color.HOTPINK,
        fill: Cesium.Color.PINK,
        strokeWidth: 3,
        markerSymbol: '?'
    }));

var promise=Cesium.GeoJsonDataSource.load('/officalCesium/Apps/baseData/guojiexian.geojson');
    promise.then(function(dataSource) {
        viewer.dataSources.add(dataSource);
        promise.then(function (dataSource) {
            viewer.dataSources.add(dataSource);
            var entities = dataSource.entities.values;
            var colorHash = {};
            for (var i = 0; i < entities.length; i++) {
                var entity = entities[i];
                var name = entity.name;
                var color = colorHash[name];
                if (!color) {
                    color = Cesium.Color.fromRandom({
                        alpha: 1.0
                    });
                    colorHash[name] = color;
                }
                entity.polygon.material = color;
                entity.polygon.outline = false;
                entity.polygon.extrudedHeight = 5000.0;
            }

        })
    });