关于ArcGis for javascript的使用
1.引用ArcGis for javascript核心类库的两种方式:
1.1.下载js包,解压缩放入项目中
1.1.1.下载核心类库压缩文件, 下载地址: https://developers.arcgis.com/downloads/
1.1.2.将下载好的文件解压缩放入项目
1.1.3.更改核心类库中的相关文件中的路径
1> 更改 ../arcgis_js_api/library/3.22/3.22/init.js 与 ../arcgis_js_api/library/3.22/3.22/dojo/dojo.js 文件
2> 将 "https://[HOSTNAME_AND_PATH_TO_JSAPI]dojo" 改为 "http://ip:port/项目路径/arcgis_js_api/library/3.22/3.22/dojo/dojo"
1.2.引用在线js类库
1 // Reference the JavaScript API from our CDN and you are ready to get started: 2 <link rel="stylesheet" href="https://js.arcgis.com/3.23/esri/css/esri.css"> 3 <script src="https://js.arcgis.com/3.23/"></script>
2.创建MAP实例
2.1.创建一个div存放地图
<div id="myMap"></div>
2.2.使用dojo引入地图所需要的工具类,例如:
1 dojo.require('esri.layers.WebTiledLayer'); // 加载天地图 2 dojo.require('dojo.parser'); 3 dojo.require('esri.request'); 4 dojo.require('dojo.domReady!'); 5 dojo.require('esri.layers.FeatureLayer'); 6 dojo.require('esri.layers.GraphicsLayer'); 7 dojo.require('esri.toolbars.navigation'); 8 dojo.require('esri.dijit.OverviewMap'); 9 dojo.require('esri.toolbars.draw'); 10 dojo.require('esri.tasks.query'); 11 dojo.require('esri.dijit.Scalebar'); 12 dojo.require('dijit.dijit'); 13 dojo.require('dijit.form.Button'); 14 dojo.require('dijit.Toolbar'); 15 dojo.require('dijit.layout.BorderContainer'); 16 dojo.require('dijit.layout.ContentPane'); 17 dojo.require('dijit.layout.AccordionContainer'); 18 dojo.require('dojo.date.locale'); 19 dojo.require('dojo.dom-style');
2.3.调用mapInit函数初始化地图
dojo.ready(mapInit); // 初始化地图
2.4.在mapInit函数中处理地图的事件
2.4.1:初始化地图范围方式一:
1 function mapInit() { 2 // 初始化范围设置 3 startExtent = new esri.geometry.Extent(mixX, mixY, maxX, maxY, 4 new esri.SpatialReference({wkid: 4490}) 5 ); 6 esri.config.defaults.map.sliderLabel = null; 7 map = new esri.Map("map", { 8 logo: false, 9 slider: false, 10 extent: startExtent 11 }); 12 }
2.4.2.初始化地图范围方式二:
1 esri.config.defaults.map.sliderLabel = null; 2 map = new esri.Map('myMap', { 3 logo: false, 4 slider: false, 5 maxZoom: z, 6 spatialReference: { 7 wkid: 4490, 8 }, 9 }); 10 point = new esri.geometry.Point(x, y); 11 map.centerAndZoom(point, z);
2.4.3.初始化地图范围方式三:(推荐)
1 esri.config.defaults.map.sliderLabel = null; 2 map = new esri.Map("map", { 3 center : [ x, y ], 4 zoom : z, 5 logo : false, 6 spatialReference : { 7 "wkid" : 4326 8 } 9 });
2.5.引入地图(瓦片图层或数据图层)
2.5.1.引入瓦片图层:
<!-- 引入瓦片地图 --> arcGISTiledMapServiceLayer = new esri.layers.ArcGISTiledMapServiceLayer(`http://ip:port/arcgis/rest/services/map/mapService/MapServer/`, { id: 'arcGISTiledMapServiceLayer', outFields: ['*'], }); map.addLayers([arcGISTiledMapServiceLayer]);
2.5.2.引入在线缓存地图:
<!-- 引入缓存地图 --> arcGISDynamicMapServiceLayer = new esri.layers.ArcGISDynamicMapServiceLayer('http://ip:port/arcgis/rest/services/map/mapService/MapServer/', { id: 'arcGISDynamicMapServiceLayer', outFields: ['*'], }); map.addLayers([arcGISDynamicMapServiceLayer]);
2.5.3.引入数据图层:
<!-- 引入数据图层 --> featureLayer = new esri.layers.FeatureLayer("http://ip:port/arcgis/rest/services/map/mapService/MapServer/0", { mode: esri.layers.FeatureLayer.MODE_ONDEMAND, id: "featureLayer", outFields: ["*"] }); map.addLayers([featureLayer]);
2.5.4.引入graphic图层
<!-- 引入graphic图层 --> graphicLayer = new esri.layers.GraphicsLayer({ id: 'graphicLayer',
outFields: ['*'],
});
map.addLayers([graphicLayer]);
2.5.5.给地图设置比例尺
scalebar = new esri.dijit.Scalebar({ map, // 地图对象 attachTo: 'bottom-right', // 控件的位置，右下角 scalebarStyle: 'line', // line 比例尺样式类型 scalebarUnit: 'metric', // 显示地图的单位，这里是km });
2.5.6.给地图上的图绑定事件
2.5.6.1.点击事件:
<!-- 给地图的底图或数据图层绑定点击事件 --> dojo.connect(map, 'onClick', function() { ...... });
2.5.6.2.点击事件:
<!-- 给地图绑定当地图的比例尺被改变时事件 --> dojo.connect(map, 'onZoomEnd', function() { ...... });
2.5.6.3.底图加载完成事件:
<!-- 当地图加载完后事件 --> dojo.connect(map, 'onUpdateEnd', function() { ...... });
2.5.6.4.鼠标移入事件:
<!-- 鼠标移入事件 --> dojo.connect(StreetLightsRtus, 'onMouseOver', function(evt) { map.setMapCursor('pointer'); ...... });
2.5.6.5.鼠标移出事件:
<!-- 鼠标移出事件 --> dojo.connect(StreetLightsRtus, 'onMouseOut', function() { map.setMapCursor(''); ...... });
2.5.6.6.地图要素的框选
<!-- 引入相关依赖 --> dojo.require('esri.toolbars.draw'); <!-- 加载框选工具Draw --> map.onLoad = initToolbar(); <!-- 禁用框选工具Draw --> draw.deactivate(); <!-- 框选 --> function initToolbar() { draw = new esri.toolbars.Draw(map); // 当完成框选范围时，在范围内找到点 dojo.connect(draw, 'onDrawEnd', function() { <!-- 找到范围内的graphic要素 --> if (graphicLayer !== undefined) { for (let i = 0; i < graphicLayer.graphics.length; i += 1) { // 判断开关箱是否在框选范围 obj = graphicLayer.graphics[i]; if (obj.geometry !== undefined) { if (obj.visible && extent.contains(obj.geometry)) { rtuObjectArr.push(obj.attributes.id); } } } } <!-- 找到范围内的feature要素 --> if (featureLayer !== undefined) { for (let i = 0; i < featureLayer.graphics.length; i += 1) { // 判断开关箱是否在框选范围 obj = featureLayer.graphics[i]; if (obj.geometry !== undefined) { if (obj.visible && extent.contains(obj.geometry)) { rtuObjectArr.push(obj.attributes.id); } } } } }); }
2.5.6.7.图层的显示与隐藏
2.5.6.7.1.图层的显示
arcGISTiledMapServiceLayer.show();
arcGISDynamicMapServiceLayer.show();
featureLayer.show();
graphicLayer.show();
2.5.6.7.2.图层的显示
arcGISTiledMapServiceLayer.hide();
arcGISDynamicMapServiceLayer.hide();
featureLayer.hide();
graphicLayer.hide();
2.6.graphicLayer图层数据的增`删`改
2.6.1.添加要素
<!-- 新增要素 --> function mapAddGraphic() { point = new esri.geometry.Point(x, y); symbol = new esri.symbol.PictureMarkerSymbol("../../../xxx.png", 16, 16); attributes = { "id": 1, "name":"新增测试" } graphic = new esri.Graphic(point, symbol, attributes); graphicLayer.add(graphic); }
2.6.2.更改要素
<!-- 更改要素 --> function mapModifyGraphic() { point = new esri.geometry.Point(x, y); symbol = new esri.symbol.PictureMarkerSymbol("../../../xxx.png", 16, 16); attributes = { "id": 1, "name":"更改测试" } graphic = new esri.Graphic(point, symbol, attributes); for (let i = 0; i < graphicLayer.graphics.length; i += 1) { if (graphicLayer.graphics[i].attributes.id === attributes.id) { graphicLayer.remove(graphicLayer.graphics[i]); } } graphicLayer.add(graphic); }
2.6.3.删除要素
<!-- 删除要素 --> function mapDeleteGraphic(graphic) { for (let i = 0; i < graphicLayer.graphics.length; i += 1) { if (graphicLayer.graphics[i].attributes.id === graphic.id) { graphicLayer.remove(graphicLayer.graphics[i]); } } }
2.7.featureLayer图层数据的增`删`改
featureLayer图层数据的增`删`改对应的要修改ArcGis Server端的数据,所以该featureLayer引用的数据链接在发布图层的时候必须开启Feature Access功能
2.7.1.添加要素
<!-- 1.引入dojo依赖 --> dojo.require('esri.dijit.editing.Add'); <!-- 2.进行添加 --> function mapAddFeature() { featureLayer = new esri.layers.FeatureLayer(`${layerUrl}1`, { mode: esri.layers.FeatureLayer.MODE_SNAPSHOT, outFields: ['*'], }); point = new esri.geometry.Point(x, y); symbol = new esri.symbol.PictureMarkerSymbol("../../../xxx.png", 16, 16); attributes = { "id": 1, "name":"新增测试" } graphic = new esri.Graphic(point, symbol, attributes); RtuAdd = new esri.dijit.editing.Add({ featureLayer, // 给哪一个要素图层添加要素 addedGraphics: [graphic], // 用于添加的要素 }); // 执行添加函数 RtuAdd.performRedo(); featureLayer.refresh(); graphic.setSymbol(symbol); featureLayer.add(graphic); }
2.7.2.更改要素
<!-- 1.引入dojo依赖 --> dojo.require('esri.dijit.editing.Update');
dojo.require('esri.tasks.query'); <!-- 2.进行更改 --> function mapModifyFeature() { featureLayer = new esri.layers.FeatureLayer(`${layerUrl}1`, { mode: esri.layers.FeatureLayer.MODE_SNAPSHOT, outFields: ['*'], }); query = new esri.tasks.Query(); query.returnGeometry = true; query.outFields = ['*']; query.where = `id=1`; queryTask = new esri.tasks.QueryTask(`${layerUrl}`); queryTask.execute(query, (results) => { if (results.features.length > 0) { oldGraphic = results.features[0]; point = new esri.geometry.Point(x, y); symbol = new esri.symbol.PictureMarkerSymbol("../../../xxx.png", 16, 16); newGraphic = new esri.Graphic(point, symbol, oldGraphic.attributes); newGraphic.attributes.id = 1; newGraphic.attributes.name = "更改测试"; newGraphic.attributes.x = x; newGraphic.attributes.y = y; RtuUpdate = new esri.dijit.editing.Update({ featureLayer, postUpdatedGraphics: [newGraphic], // 修改之后的要素 preUpdatedGraphics: [oldGraphic], // 修改之前的要素 }); RtuUpdate.performRedo(); featureLayer.refresh(); for (let i = 0; i < graphicLayer.graphics.length; i += 1) { if (graphicLayer.graphics[i].attributes.id === oldGraphic.id) { graphicLayer.remove(graphicLayer.graphics[i]); } } featureLayer.add(newGraphic); } else { mapAddFeature(); } }); }
2.7.3.删除要素
<!-- 1.引入dojo依赖 --> dojo.require('esri.dijit.editing.Delete');
dojo.require('esri.tasks.query'); <!-- 2.进行更改 --> function mapDeleteLamp() { featureLayer = new esri.layers.FeatureLayer(`${layerUrl}1`, { mode: esri.layers.FeatureLayer.MODE_SNAPSHOT, outFields: ['*'], }); query = new esri.tasks.Query(); query.returnGeometry = true; query.outFields = ['*']; query.where = `id=1`; queryTask = new esri.tasks.QueryTask(`${layerUrl}`); queryTask.execute(query, (results) => { graphic = results.features[0]; RtuDelete = new esri.dijit.editing.Delete({ featureLayer, deletedGraphics: [graphic], }); RtuDelete.performRedo(); featureLayer.refresh(); for (let i = 0; i < featureLayer.graphics.length; i += 1) { if (featureLayer.graphics[i].attributes.id === id) { featureLayer.remove(featureLayer.graphics[i]); } } }); }
3.1.根据经纬度数组在地图上画线
polylineJson = { "paths": [[[120.140524529883, 30.3270758041052], [120.140235682031, 30.3270525737175], [120.139817472998, 30.3270240400276], [120.139431404836, 30.3270008815856]]]};
xlPolyline = new esri.geometry.Polyline(polylineJson);
xlSymbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color('#00FF00'), 4);
xlGraphic = new esri.Graphic(xlPolyline, xlSymbol);
polylineLayer.add(xlGraphic);
3.2.跟据经纬度在地图上画圆
point = new esri.geometry.Point(x, y); symbol = new esri.symbol.SimpleMarkerSymbol(esri.symbol.SimpleMarkerSymbol.STYLE_CIRCLE, (r)), new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255, 0, 0]), 0.1), new dojo.Color([255, 0, 0, 0.6])); graphic = new esri.Graphic(point, symbol, item); schoolElectricityLayer.add(graphic);
3.3.根据经纬度数组在地图上画面
polygonJson ={ rings: [[ [120.193451, 30.283218], [120.194453, 30.263535], [120.165335, 30.264035], [120.161023, 30.278568], [120.168414, 30.280866], [120.166471, 30.288568], [120.162369, 30.288824], [120.158991, 30.295311], [120.172835, 30.300009], [120.16372, 30.314242], [120.164879, 30.317144], [120.192948, 30.352787], [120.20639, 30.3569], [120.21079, 30.35175], [120.218307, 30.351427], [120.217978, 30.340206], [120.209947, 30.336802], [120.209419, 30.328492], [120.203206, 30.327809], [120.213779, 30.326153], [120.209763, 30.321596], [120.19666, 30.318027], [120.194544, 30.307804], [120.19983, 30.308465], [120.191775, 30.295249], [120.193451, 30.283218]]], spatialReference: {wkid: 4326} }; polygon = new esri.geometry.Polygon(polygonJson); symbol = new esri.symbol.SimpleFillSymbol( esri.symbol.SimpleFillSymbol.STYLE_SOLID, new esri.symbol.SimpleLineSymbol( esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color("#ff0000"), 1), new dojo.Color([172, 148, 85, 0.25])); graphic = new esri.Graphic(polygon, symbol, {行政区: "下城区"}); polygonLayer.add(graphic);
3.4.根据经纬度定位地图中心
function mapSetPointAndZoom(x, y, z) { point = new esri.geometry.Point(x, y); map.centerAndZoom(point, z); }
3.5.根据经纬度数数组在地图上进行轨迹运动
3.5.1.创建按钮事件:
<div id="myMap">
<span>
<input type="button" id="runningStark" value="设置起点" onclick="runningStark()"/>
<input type="button" id="openTool" value="开启" onclick="openTool()"/>
<input type="button" id="closeTool" value="暂停" onclick="closeTool()"/>
<input type="button" id="continueTool" disabled="disabled" value="继续" onclick="continueTool()"/>
<input type="button" id="returnTool" disabled="disabled" readonly value="返回" onclick="returnTool()"/>
</span>
</div>
3.5.2.准备数据:
polylineJson = { // 测试数据
"paths": [[
[120.140524529883, 30.3270758041052], [120.140235682031, 30.3270525737175], [120.139817472998, 30.3270240400276], [120.139431404836, 30.3270008815856],
[120.139123789931, 30.3270506635574], [120.138809475077, 30.3271387683396], [120.138707810317, 30.3269174361909], [120.138343646942, 30.3268787653429],
[120.138002517003, 30.3268448321235], [120.137661679343, 30.3268103188413], [120.137338229176, 30.3267788839385], [120.137012494731, 30.3267463536615],
[120.136655150015, 30.3267106370864], [120.136298906969, 30.3266752415693], [120.135942734070, 30.3266398667366], [120.135580169689, 30.3266049748399],
[120.135589970501, 30.3265466502079], [120.135493511916, 30.3265342665433], [120.135307094147, 30.3265103346844], [120.135237810377, 30.3265014403893],
[120.135230226394, 30.3265702421231], [120.134855343999, 30.3265328932786], [120.134527389128, 30.3265009583527], [120.134170643361, 30.3264658119479],
[120.133820501315, 30.3264309839029], [120.133472301805, 30.3263960002753], [120.133120725341, 30.3263816030287], [120.132775043034, 30.3263553985830],
[120.132400386369, 30.3263183069445], [120.132396155958, 30.3263859143786], [120.132103850213, 30.3263658298193], [120.131776976327, 30.3263433701506],
[120.131677380907, 30.3263365272092], [120.131652148628, 30.3259547497121]
]],
"spatialReference":{"wkid":4326}
};
3.5.3.设置起点:
function runningStark(){ // 创建路线 xlPolyline = new esri.geometry.Polyline(polylineJson); xlSymbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_DASH,new dojo.Color("#0000FF"),3); xlGraphic = new esri.Graphic(xlPolyline,xlSymbol); map.graphics.add(xlGraphic); // 创建起点 qdPoint = new esri.geometry.Point(120.140524529883, 30.3270758041052,new esri.SpatialReference({wkid:4490})); qdSymbol = new esri.symbol.PictureMarkerSymbol("/demo0607/images/car.png",10,20); qdGraphic = new esri.Graphic(qdPoint,qdSymbol); map.centerAndZoom(qdPoint,17); // 定位到起点 map.graphics.add(qdGraphic); }
3.5.4.开始轨迹:
function openTool(){ if(typeof(moving)!="undefined"){ clearInterval(moving); //清除移动 } points = polylineJson.paths[0]; qdGraphic.geometry.x = points[0][0]; qdGraphic.geometry.y = points[0][1]; map.graphics.refresh(); move(0,1); document.getElementById("closeTool").disabled=false; document.getElementById("continueTool").disabled=true; document.getElementById("returnTool").disabled=true; }
3.5.5.暂停轨迹
function closeTool(){ clearInterval(moving); document.getElementById("continueTool").disabled=false; document.getElementById("returnTool").disabled=false; }
3.5.6.继续轨迹
function continueTool(){ if(typeof(moving)!="undefined"){ clearInterval(moving); // 清除移动 } move(startNum,endNum); document.getElementById("returnTool").disabled=true; }
3.5.7.返回起点
function returnTool(){ qdGraphic.geometry.x = points[0][0]; qdGraphic.geometry.y = points[0][1]; qdGraphic.symbol.angle=0; map.graphics.refresh(); $("continueTool").disabled=true; }
3.5.8.相关工具函数
3.5.8.1.根据序列点坐标 进行移动
function move(start,end){ startX = points[start][0]; startY = points[start][1]; endX = points[end][0]; endY = points[end][1]; p = (endY - startY) / (endX - startX);//斜率 var v = 0.000315;//距离 距离越小 位置越精确 moving = setInterval(function(){ startNum = start; endNum = end; if(endNum == points.length - 1){ document.getElementById("closeTool").disabled=true; document.getElementById("continueTool").disabled=true; document.getElementById("returnTool").disabled=false; } //分别计算 x,y轴方向速度 if(Math.abs(p) == Number.POSITIVE_INFINITY){//无穷大 qdGraphic.geometry.y += v; } else { if(endX < startX){ //qdGraphic.geometry.x -= (1 / Math.sqrt(1 + p * p)) * v; //qdGraphic.geometry.y -= (p / Math.sqrt(1 + p * p)) * v; qdGraphic.geometry.x = endX; qdGraphic.geometry.y = endY; //计算汽车角度 qdGraphic.symbol.angle = calculateXAndYVision(startX, startY, endX, endY); //// (Math.PI / 2 - Math.atan(p)) * 180 / Math.PI+180 } else { //qdGraphic.geometry.x += (1 / Math.sqrt(1 + p * p)) * v; //qdGraphic.geometry.y += (p / Math.sqrt(1 + p * p)) * v; qdGraphic.geometry.x = endX; qdGraphic.geometry.y = endY; //计算汽车角度 qdGraphic.symbol.angle = calculateXAndYVision(startX, startY, endX, endY); ////(Math.PI / 2 - Math.atan(p)) * 180 / Math.PI } } //图层刷新 map.graphics.refresh(); //if (Math.abs(qdGraphic.geometry.x - endX) <= 0.01 && Math.abs(qdGraphic.geometry.y - endY) <= 0.01) { clearInterval(moving); startNum = start++; endNum = end++; if (end < points.length){ move(start, end); } //} }, 300); }
3.5.8.2.计算x和y的视角
function calculateXAndYVision(startX, startY, endX, endY){ tan = Math.atan(Math.abs((endY - startY)/(endX - startX))) * 180 / Math.PI + 90; if (endX > startX && endY > startY){ // 第一象限 return - tan + 180; } else if (endX > startX && endY < startY){ // 第二象限 return tan; } else if (endX < startX && endY > startY){ // 第三象限 return tan - 180; } else if (endX < startX && endY < startY){ // 第四象限 return - tan; } }
