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  • Leaflet(Esri)初识

    加载本地地图
    <html>
    <head>
    <metacharset=utf-8/>
    <title>IdentifyingFeatures</title>
    <metaname='viewport'content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
    
    <!--从CDN上引入leaflet的文件-->
    <linkrel="stylesheet"href="//cdn.jsdelivr.net/leaflet/0.7.3/leaflet.css"/>
    <scriptsrc="//cdn.jsdelivr.net/leaflet/0.7.3/leaflet.js"></script>
    
    <!--从CDN上引入Esri的包-->
    <scriptsrc="//cdn-geoweb.s3.amazonaws.com/esri-leaflet/1.0.0-rc.6/esri-leaflet.js"></script>
    
    <style>
    body{margin:0;padding:0;}
    #map{position:absolute;top:0;bottom:0;right:0;left:0;}
    </style>
    </head>
    <body>
    
    <style>
    #selectedFeatures{
    position:absolute;
    top:10px;
    right:10px;
    z-index:10;
    background:white;
    padding:1em;
    }
    </style>
    
    <divid="map"></div>
    <script>
    varmap=L.map('map').setView([34.03,103.8],13);
    
    L.esri.basemapLayer('Gray').addTo(map);
    
    varGSAU=L.esri.dynamicMapLayer('http://localhost:6080/arcgis/rest/services/GSAU/20141107NetworkAnalysise/MapServer',{
    opacity:0.5,
    useCors:false
    }).addTo(map);
    
    varidentifiedFeature;
    map.on('click',function(e){
    if(identifiedFeature){
    map.removeLayer(identifiedFeature);
    }
    GSAU.identify().on(map).at(e.latlng).run(function(error,featureCollection){
    identifiedFeature=newL.GeoJSON(featureCollection.features[0],{
    style:function(){
    return{
    color:'#5C7DB8',
    weight:2
    };
    }
    }).addTo(map);
    });
    });
    </script>
    </body>
    </html>    
    
    
    这么多的链式函数???不要大惊小怪,通过查看leaflet(Esri)的API可以看到,大多函数返回的都是this.再打开控制台,键入this,奇迹出现了,就是window,是不是明白什么了????
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  • 原文地址:https://www.cnblogs.com/shangguanjinwen/p/4448816.html
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