arcgis增大缩放级别

￡神魔★判官ぃ 2021-11-23 06:08 166阅读 0赞

<!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <title>增大缩放级别</title>
        <link rel="stylesheet" href="http://js.arcgis.com/3.9/js/dojo/dijit/themes/tundra/tundra.css" />
        <link rel="stylesheet" href="http://js.arcgis.com/3.9/js/esri/css/esri.css" />
        <style>
            html, body, #mapDiv {
         
                padding: 0;
                margin: 0;
                height: 100%;
            }
        </style>
        <script src="http://js.arcgis.com/3.9/"></script>
        <script type="text/javascript" src="js/MapExtends.js"></script>
        <script type="text/javascript">
            var map, agoLayer;
            require(["dojo/parser", "esri/map", "esri/geometry/Extent", "esri/layers/ArcGISTiledMapServiceLayer", "esri/layers/FeatureLayer", "dijit/registry", "dijit/form/Button", "dojo/domReady!"],
                function (parser, Map, Extent, ArcGISTiledMapServiceLayer, FeatureLayer, registry) {
                    parser.parse();
    
                    var initExtent = new Extent({
                        xmax: -13624229.32056175,
                        xmin: -13625120.886837104,
                        ymax: 4548374.604660432,
                        ymin: 4547966.144290476,
                        "spatialReference": {
                            "wkid": 102100
                        }
                    });
                    map = new Map("mapDiv", {
                        extent: initExtent,
                        logo: false
                    });
                    var agoServiceURL = "http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer";
                    agoLayer = new ArcGISTiledMapServiceLayer(agoServiceURL);
                    map.addLayer(agoLayer);
    
                    var featureLayer = new FeatureLayer("http://servicesbeta.esri.com/arcgis/rest/services/SanFrancisco/SFStreetTreesRendered/MapServer/0", {
                        mode: FeatureLayer.MODE_ONDEMAND
                    });
                    map.addLayer(featureLayer);
    
                    map.on('extent-change', showScaleInfo);
    
                    registry.byId("addNums").on("click", function () {
                        var oldLevels = map.getNumLevels();
                        map.addNumLevels(4);
                        var currentLevelsNum = map.getNumLevels();
                        alert("原总缩放级别为" + oldLevels + ";增加后总缩放级别为" + currentLevelsNum);
                    });
    
                    function showScaleInfo(evt) {
                        var scaletext = map.getLevel();
                        document.getElementById("scaleInfo").innerHTML = scaletext;
                    }
    
                });      
        </script>
    </head>
    <body class="tundra">
        <div id="mapDiv" style="position:relative; width:100%; height:100%; border:1px solid #000;">
            <button data-dojo-type="dijit/form/Button" id="addNums">
                增加放大级别数
            </button>
            <div id="scaleInfo0" style="position: absolute; left: 100px; visibility:visible; bottom: 2px; z-index: 100;">当前缩放级别：</div>
            <div id="scaleInfo" style="position: absolute; left: 210px; visibility:visible; bottom: 2px; z-index: 100;"></div>
        </div>
    </body>
    </html>

转载于:https://www.cnblogs.com/Jeely/p/11174903.html