ArcGIS Javascript API - 如何爲現有地圖添加多個狀態？

我是ARCGIS的新手。有人可以告訴我如何添加2個狀態新澤西州和特拉華州到現有的代碼？以便它與紐約一起顯示。ArcGIS Javascript API - 如何爲現有地圖添加多個狀態？

是否還有一個通配符選項來添加所有狀態？

<!DOCTYPE html> 
<html> 
    <head> 
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
    <!--The viewport meta tag is used to improve the presentation and behavior of the samples 
     on iOS devices--> 
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"> 
    <title>Class Breaks Renderer</title> 

    <link rel="stylesheet" href="http://js.arcgis.com/3.11/esri/css/esri.css"> 
    <style> 
     html, body, #map{ 
     height: 100%; 
     margin: 0; 
     padding: 0; 
     } 
    </style> 
    <script src="http://js.arcgis.com/3.11/"></script> 
    <script> 

    //https://developers.arcgis.com/javascript/jssamples/renderer_class_breaks.html 
     var map; 
     require([ 
     "esri/map", "esri/layers/FeatureLayer", 
     "esri/InfoTemplate", "esri/symbols/SimpleFillSymbol", 
     "esri/renderers/ClassBreaksRenderer", 
     "esri/Color", "dojo/dom-style", "dojo/domReady!" 
     ], function(
     Map, FeatureLayer, 
     InfoTemplate, SimpleFillSymbol, 
     ClassBreaksRenderer, 
     Color, domStyle 
    ) { 
     map = new Map("map", { 
      basemap: "streets", 
      center: [-74.215, 42.382], 
      zoom: 7, 
      slider: false 
     }); 

     var symbol = new SimpleFillSymbol(); 
     symbol.setColor(new Color([150, 150, 150, 0.5])); 

     // Add five breaks to the renderer. 
     // If you have ESRI's ArcMap available, this can be a good way to determine break values. 
     // You can also copy the RGB values from the color schemes ArcMap applies, or use colors 
     // from a site like www.colorbrewer.org 
     // 
     // alternatively, ArcGIS Server's generate renderer task could be used 
     var renderer = new ClassBreaksRenderer(symbol, "POP07_SQMI"); 
     renderer.addBreak(0, 25, new SimpleFillSymbol().setColor(new Color([56, 168, 0, 0.5]))); 
     renderer.addBreak(25, 75, new SimpleFillSymbol().setColor(new Color([139, 209, 0, 0.5]))); 
     renderer.addBreak(75, 175, new SimpleFillSymbol().setColor(new Color([255, 255, 0, 0.5]))); 
     renderer.addBreak(175, 400, new SimpleFillSymbol().setColor(new Color([255, 128, 0, 0.5]))); 
     renderer.addBreak(400, Infinity, new SimpleFillSymbol().setColor(new Color([255, 0, 0, 0.5]))); 

     var infoTemplate = new InfoTemplate("${NAME}", "${*}"); 
     var featureLayer = new FeatureLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/3", { 
      mode: FeatureLayer.MODE_SNAPSHOT, 
      outFields: ["*"], 
      infoTemplate: infoTemplate 
     }); 

     featureLayer.setDefinitionExpression("STATE_NAME = 'New York'"); 
     featureLayer.setRenderer(renderer); 
     map.addLayer(featureLayer); 
     }); 
    </script> 
    </head> 

    <body> 
    <div id="map"></div> 
    </body> 

</html>

來源

2014-12-01 user244394

你只需要改變你的榜樣定義表達式包括其他國家，所以你可以說

featureLayer.setDefinitionExpression("STATE_NAME IN ('New York', 'New Jersey', 'Delaware')");

，如果你刪除了這一行，將加入所有的狀態。

您可以在http://jsfiddle.net/q1tvcpak/

來源

2014-12-01 20:59:25

ArcGIS Javascript API - 如何爲現有地圖添加多個狀態？

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