cesiumjs的一些简单地图应用，主要包含cesium调用arcgis服务

/**
* arcgis影像
*/
function createEsriImageryProvider(){
var esriImageryProvider = new Cesium.ArcGisMapServerImageryProvider({
   url : 'https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer'
});
return esriImageryProvider;
}


/**
* 天地图影像
*/
function createTdtiImageryProvider(){
var tdtImageryProvider=new Cesium.WebMapTileServiceImageryProvider({
url: "http://t0.tianditu.com/img_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=img&tileMatrixSet=w&TileMatrix={TileMatrix}&TileRow={TileRow}&TileCol={TileCol}&style=default&format=tiles",
layer: "tdtBasicLayer",
style: "default",
format: "image/jpeg",
tileMatrixSetID: "GoogleMapsCompatible",
show: true
});
return tdtImageryProvider;
}
/**
* 全局定义球
*/
var viewer =null;

/**
* 初始化球面
* @param imageryProvider 影像
*/
function createCesiumCircle(imageryProvider){
if(viewer==null){
viewer = new Cesium.Viewer('cesiumContainer', {
scene3DOnly: true, 
baseLayerPicker: false,  //非控件添加地图，必须为false，不然直接报错
imageryProvider: imageryProvider, //初始背景
animation: false,
fullscreenButton: false,
geocoder: false,
homeButton: false,
infoBox: true,
sceneModePicker: false,
selectionIndicator: false,
timeline: false,
navigationHelpButton: false,
navigationInstructionsInitiallyVisible: false
}
);
}else{
viewer.imageryProvider=imageryProvider;
}

}

/**
* 创建虚拟的地形图
* @returns {Cesium.VRTheWorldTerrainProvider}
*/
function createVrTheWorldProvider(){
var vrTheWorldProvider = new Cesium.VRTheWorldTerrainProvider({
   url : 'http://www.vr-theworld.com/vr-theworld/tiles1.0.0/73/',
   credit : 'Terrain data courtesy VT MÄK'
});
return vrTheWorldProvider;
}


/**
* 创建arcgis地形图
* @returns {Cesium.ArcGisImageServerTerrainProvider}
*/
function createArcGisTerrainProvider(){
var terrainProvider = new Cesium.ArcGisImageServerTerrainProvider({
 url : 'https://elevation.arcgisonline.com/ArcGIS/rest/services/WorldElevation/DTMEllipsoidal/ImageServer',
 token : 'KED1aF_I4UzXOHy3BnhwyBHU4l5oY6rO6walkmHoYqGp4XyIWUd5YZUC1ZrLAzvV40pR6gBXQayh0eFA8m6vPg..',
 proxy : new Cesium.DefaultProxy('/terrain/')
});
return terrainProvider;
}


/**
* 创建本地的离线的地形服务
* @param url 连接参数（//localhost:8087/terrain）
* @return CesiumTerrainProvider
*/
function createLocalTerrainProvider(url){
// viewer.extend(Cesium.viewerCesiumInspectorMixin);
var localTerrainProvider=new Cesium.CesiumTerrainProvider({
        url: url
    });


    return localTerrainProvider;
}

/**
* 叠合arcgis的动态服务
* @param url (//192.168.0.105:6080/arcgis/rest/services//cx/gjslgy/MapServer)
*/
function addArcGisImageryProvider(url){
var layers = viewer.scene.imageryLayers;

var slgylayer = layers.addImageryProvider( new Cesium.ArcGisMapServerImageryProvider( {  
   url : url,  
   maximumLevel : 8,  
})); 

slgylayer.alpha = 0.1; //透明度

//设置图层的亮度  
slgylayer.brightness = 2.0;  //设置亮度
}


/**
* 创建arcgis影像服务
* @param  {[type]} url [description]
* @return {[type]}     [description]
*/
function createArcgisImageProvider(url){
var arcgis=new Cesium.ArcGisMapServerImageryProvider( {  
   url : url 
});
return arcgis;
}

/**
* 图形地球
* @param url （../wdpjs/cesiumjs/baseImage.png）
* @returns {Cesium.SingleTileImageryProvider}
*/
function createSingleImageryProvider(url){
var singleImageryProvider=new Cesium.SingleTileImageryProvider({
url: url,
show: true
});

return singleImageryProvider;
}

/**
* 加载地形服务
* @param terrainProvider
*/
function addTerrainProvider(terrainProvider){
viewer.terrainProvider =terrainProvider;
}

/**
* 创建格网
* @param rectangleHalfSize
* @returns {Array}
*/
function createGrid(rectangleHalfSize) {
   var gridWidth = 41;
   var gridHeight = 41;
   var everestLatitude = Cesium.Math.toRadians(27.988257);
   var everestLongitude = Cesium.Math.toRadians(86.925145);
   var e = new Cesium.Rectangle(everestLongitude - rectangleHalfSize, everestLatitude - rectangleHalfSize, everestLongitude + rectangleHalfSize, everestLatitude + rectangleHalfSize);
   var terrainSamplePositions = [];
   for (var y = 0; y < gridHeight; ++y) {
       for (var x = 0; x < gridWidth; ++x) {
           var longitude = Cesium.Math.lerp(e.west, e.east, x / (gridWidth - 1));
           var latitude = Cesium.Math.lerp(e.south, e.north, y / (gridHeight - 1));
           var position = new Cesium.Cartographic(longitude, latitude);
           terrainSamplePositions.push(position);
       }
   }
   return terrainSamplePositions;
}



/**
* 设置相机倾斜角度
*/
function lookAtMtEverest() {
   var target = new Cesium.Cartesian3(300770.50872389384, 5634912.131394585, 2978152.2865545116);
   var offset = new Cesium.Cartesian3(6344.974098678562, -793.3419798081741, 2499.9508860763162);
   viewer.camera.lookAt(target, offset);
   viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
}

/**
* 地形加载成功事件
* @param terrainSamplePositions
*/
function sampleTerrainSuccess(terrainSamplePositions) {
   var ellipsoid = Cesium.Ellipsoid.WGS84;
   viewer.scene.globe.depthTestAgainstTerrain = true;

   viewer.entities.suspendEvents();
   viewer.entities.removeAll();

   for (var i = 0; i < terrainSamplePositions.length; ++i) {
       var position = terrainSamplePositions[i];

       viewer.entities.add({
           name : position.height.toFixed(1),
           position : ellipsoid.cartographicToCartesian(position),
           billboard : {
               verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
               scale : 0.7,
               image : '../images/facility.gif'
           },
           label : {
               text : position.height.toFixed(1),
               font : '10pt monospace',
               horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
               pixelOffset : new Cesium.Cartesian2(0, -14),
               fillColor : Cesium.Color.BLACK,
               outlineColor : Cesium.Color.BLACK,
               showBackground : true,
               backgroundColor : new Cesium.Color(0.9, 0.9, 0.9, 0.7),
               backgroundPadding : new Cesium.Cartesian2(4, 3)
           }
       });
   }
   viewer.entities.resumeEvents();
}

/**
* 添加一个影像服务，控制影像服务显示范围
* @param imageryProvider 影像服务
* @param minlat 最小纬度
* @param minlon 最小经度
* @param maxlat 最大纬度
* @param maxlon 最大经度
*/
function setLayerRectangle(imageryProvider,minlat,minlon,maxlat,maxlon){
var layers = viewer.scene.imageryLayers;  
imageryProvider.rectangle=Cesium.Rectangle.fromDegrees(minlat,minlon,maxlat,maxlon); 
//添加一个图层，在特定位置绘制一个图片  
layers.addImageryProvider(imageryProvider);
}




/**
* 返回stk-terrain
* @return {[type]} [description]
*/
function createStkTerrainProvider(){
var cesiumTerrainProviderMeshes = new Cesium.CesiumTerrainProvider({
   url : 'https://assets.agi.com/stk-terrain/v1/tilesets/world/tiles',
   requestWaterMask : true,
   requestVertexNormals : true
});
return cesiumTerrainProviderMeshes;
}







/**
* 测试用例
*/
function testdemo(){

//1、创建球面
//var imageProvider=createTdtiImageryProvider();
//
//var imageProvider=createSingleImageryProvider("../wdpjs/cesiumjs/baseImage.png");


//var imageProvider=createSingleImageryProvider("../wdpjs/cesiumjs/globe.tif");


//var imageProvider=createArcgisImageProvider("http://192.168.0.101:6080/arcgis/rest/services//cx/xjyx/MapServer");

//此处用一张图全球的低分分辨率
var imageryProvider=createArcgisImageProvider("http://192.168.0.101:6080/arcgis/rest/services//cx/globe/MapServer");
createCesiumCircle(imageryProvider);


viewer.imageryLayers.addImageryProvider(new Cesium.ArcGisMapServerImageryProvider({
   url: "http://192.168.0.101:6080/arcgis/rest/services//cx/xjyx/MapServer"
}));



//2、加载地形
//虚拟地形(一般国内能够访问)
//var terrainProvider=createVrTheWorldProvider();


//stk地形（一般需要翻墙才能访问）
//var terrainProvider=createStkTerrainProvider();
var terrainProvider=createLocalTerrainProvider("//localhost:8087/terrain");


addTerrainProvider(terrainProvider);

//3、设置渲染效果
//var terrainSamplePositions = createGrid(0.005);
 //  Cesium.when(Cesium.sampleTerrain(viewer.terrainProvider, 9, terrainSamplePositions), sampleTerrainSuccess);
   
   //4、设置相机倾斜度
   //lookAtMtEverest();
   
   //5、arcgis影像服务
   addArcGisImageryProvider("//192.168.0.101:6080/arcgis/rest/services//cx/sheng/MapServer");
   //
   //http://192.168.0.101:6080/arcgis/rest/services//cx/xjyx/MapServer
   
  // 6、添加标注
   //
   //
   //
  /* viewer.imageryLayers.addImageryProvider(new Cesium.WebMapTileServiceImageryProvider({
   url: "http://t0.tianditu.com/cia_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=cia&tileMatrixSet=w&TileMatrix={TileMatrix}&TileRow={TileRow}&TileCol={TileCol}&style=default.jpg",
   layer: "tdtAnnoLayer",
   style: "default",
   format: "image/jpeg",
   tileMatrixSetID: "GoogleMapsCompatible",
   show: false
}));*/


}






//启动测试代码

testdemo();