如何使用ArcGIS JavaScript API在地图上绘制自定义图形？

Question

我希望每个用户都能够绘制自己的区域，并且他们下次登录时可以自动加载该区域。如何使用ArcGIS JavaScript API和ArcGIS Server实现此功能？

Answer 1

那么，很显然，要在地图上绘制一些功能，并存储该somwhere所以当使用访问，他/她可以在地图上看到最后绘制的功能，下一次。

首先，您需要在arcgis服务器中发布可编辑的要素图层，以便保存所有的功能。

下面是公司招聘

var map; 
 
     require([ 
 
     "esri/map", 
 
     "esri/toolbars/draw", 
 
     "esri/toolbars/edit", 
 
     "esri/graphic", 
 
     "esri/config", 
 

 
     "esri/layers/FeatureLayer", 
 

 
     "esri/symbols/SimpleMarkerSymbol", 
 
     "esri/symbols/SimpleLineSymbol", 
 
     "esri/symbols/SimpleFillSymbol", 
 

 
     "esri/dijit/editing/TemplatePicker", 
 

 
     "dojo/_base/array", 
 
     "dojo/_base/event", 
 
     "dojo/_base/lang", 
 
     "dojo/parser", 
 
     "dijit/registry", 
 

 
     "dijit/layout/BorderContainer", "dijit/layout/ContentPane", 
 
     "dijit/form/Button", "dojo/domReady!" 
 
     ], function(
 
     Map, Draw, Edit, Graphic, esriConfig, 
 
     FeatureLayer, 
 
     SimpleMarkerSymbol, SimpleLineSymbol, SimpleFillSymbol, 
 
     TemplatePicker, 
 
     arrayUtils, event, lang, parser, registry 
 
    ) { 
 
     parser.parse(); 
 

 
     // refer to "Using the Proxy Page" for more information: https://developers.arcgis.com/javascript/3/jshelp/ags_proxy.html 
 
     esriConfig.defaults.io.proxyUrl = "/proxy/"; 
 

 
     // This service is for development and testing purposes only. We recommend that you create your own geometry service for use within your applications. 
 
     esriConfig.defaults.geometryService = new esri.tasks.GeometryService("https://utility.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer"); 
 

 
     map = new Map("map", { 
 
      basemap: "streets", 
 
      center: [-83.244, 42.581], 
 
      zoom: 15 
 
     }); 
 

 
     map.on("layers-add-result", initEditing); 
 

 
     var landusePointLayer = new FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/6", { 
 
      mode: FeatureLayer.MODE_SNAPSHOT, 
 
      outFields: ["*"] 
 
     }); 
 
     var landuseLineLayer = new FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/8", { 
 
      mode: FeatureLayer.MODE_SNAPSHOT, 
 
      outFields: ["*"] 
 
     }); 
 
     var landusePolygonLayer = new FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/9", { 
 
      mode: FeatureLayer.MODE_SNAPSHOT, 
 
      outFields: ["*"] 
 
     }); 
 

 
     map.addLayers([landusePointLayer, landuseLineLayer, landusePolygonLayer]); 
 

 
     function initEditing(evt) { 
 
      console.log("initEditing", evt); 
 
      // var map = this; 
 
      var currentLayer = null; 
 
      var layers = arrayUtils.map(evt.layers, function(result) { 
 
      return result.layer; 
 
      }); 
 
      console.log("layers", layers); 
 

 
      var editToolbar = new Edit(map); 
 
      editToolbar.on("deactivate", function(evt) { 
 
      currentLayer.applyEdits(null, [evt.graphic], null); 
 
      }); 
 

 
      arrayUtils.forEach(layers, function(layer) { 
 
      var editingEnabled = false; 
 
      layer.on("dbl-click", function(evt) { 
 
       event.stop(evt); 
 
       if (editingEnabled === false) { 
 
       editingEnabled = true; 
 
       editToolbar.activate(Edit.EDIT_VERTICES , evt.graphic); 
 
       } else { 
 
       currentLayer = this; 
 
       editToolbar.deactivate(); 
 
       editingEnabled = false; 
 
       } 
 
      }); 
 

 
      layer.on("click", function(evt) { 
 
       event.stop(evt); 
 
       if (evt.ctrlKey === true || evt.metaKey === true) { //delete feature if ctrl key is depressed 
 
       layer.applyEdits(null,null,[evt.graphic]); 
 
       currentLayer = this; 
 
       editToolbar.deactivate(); 
 
       editingEnabled=false; 
 
       } 
 
      }); 
 
      }); 
 

 
      var templatePicker = new TemplatePicker({ 
 
      featureLayers: layers, 
 
      rows: "auto", 
 
      columns: 2, 
 
      grouping: true, 
 
      style: "height: auto; overflow: auto;" 
 
      }, "templatePickerDiv"); 
 

 
      templatePicker.startup(); 
 

 
      var drawToolbar = new Draw(map); 
 

 
      var selectedTemplate; 
 
      templatePicker.on("selection-change", function() { 
 
      if(templatePicker.getSelected()) { 
 
       selectedTemplate = templatePicker.getSelected(); 
 
      } 
 
      switch (selectedTemplate.featureLayer.geometryType) { 
 
       case "esriGeometryPoint": 
 
       drawToolbar.activate(Draw.POINT); 
 
       break; 
 
       case "esriGeometryPolyline": 
 
       drawToolbar.activate(Draw.POLYLINE); 
 
       break; 
 
       case "esriGeometryPolygon": 
 
       drawToolbar.activate(Draw.POLYGON); 
 
       break; 
 
      } 
 
      }); 
 

 
      drawToolbar.on("draw-end", function(evt) { 
 
      drawToolbar.deactivate(); 
 
      editToolbar.deactivate(); 
 
      var newAttributes = lang.mixin({}, selectedTemplate.template.prototype.attributes); 
 
      var newGraphic = new Graphic(evt.geometry, null, newAttributes); 
 
      selectedTemplate.featureLayer.applyEdits([newGraphic], null, null); 
 
      }); 
 
     } 
 
     });

 html, body { 
 
     height: 100%; 
 
     width: 100%; 
 
     margin: 0; 
 
     padding: 0; 
 
     overflow:hidden; 
 
     } 
 
     #header { 
 
     border:solid 2px #462d44; 
 
     background:#fff; 
 
     color:#444; 
 
     -moz-border-radius: 4px; 
 
     border-radius: 4px; 
 
     font-family: sans-serif; 
 
     font-size: 1.1em 
 
     padding-left:20px; 
 
     } 
 
     #map { 
 
     padding:1px; 
 
     border:solid 2px #444; 
 
     -moz-border-radius: 4px; 
 
     border-radius: 4px; 
 
     } 
 
     #rightPane { 
 
     border:none; 
 
     padding: 0; 
 
     width:228px; 
 
     } 
 
     .templatePicker { 
 
     border: solid 2px #444; 
 
     }

<link rel="stylesheet" href="https://js.arcgis.com/3.20/dijit/themes/claro/claro.css"> 
 
    <link rel="stylesheet" href="https://js.arcgis.com/3.20/esri/css/esri.css"> 
 
    <script src="https://js.arcgis.com/3.20/"></script> 
 
    
 
    <body class="claro"> 
 
    <div data-dojo-type="dijit/layout/BorderContainer" data-dojo-props="gutters:true, design:'headline'" style="width:100%;height:100%;"> 
 
     <div data-dojo-type="dijit/layout/ContentPane" id="header" data-dojo-props="region:'top'">Use ctrl or cmd + click on graphic to delete. Double click on graphic to edit vertices. </div> 
 
     <div id="map" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'center'"></div> 
 
     <div id="rightPane" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'right'"> 
 
     <div id="templatePickerDiv"></div> 
 
     </div> 
 
    </div> 
 
    </body>

更新启动消费这个样品之前代理的工作样本。

实时运行的样本 -https://developers.arcgis.com/javascript/3/sandbox/sandbox.html?sample=ed_feature_creation

希望这将帮助你:)