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#Visual area analysis

Specify the location and parameters in the map scene to create visual domain analysis, and support simultaneous analysis of 2D maps, fill-extrusion building layers, model layers, and 3DTiles layers.

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   <!DOCTYPE html>
   <html>
   <head>
       <meta charset="utf-8"/>
       <title>Visual area analysis</title>
       <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"/>
       <style>
           body {
               margin: 0;
               padding: 0;
           }

           #map {
               position: absolute;
               top: 0;
               bottom: 0;
               width: 100%;
           }

            .btn-group {
                   position: absolute;
                   top: 20px;
                   left: 20px;
               }
       </style>
       <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.16.0/mapmost-webgl-min.js"></script>
   </head>
   <body>
   <div id="map"></div>
    <div class="btn-group">
        <button onClick="add()">Add visual area analysis</button>
        <button onClick="remove()">Remove visual area analysis</button>
    </div>
   <script>
      var map = new mapmost.Map({
       container: 'map',  
       style: "<your style url>", 
       center: [120.75007613619039,31.312762277059107], 
       zoom: 16, 
       pitch: 60,
       userId: '***', // Authorization code
     });

    let analysis;

    function add() {
        analysis = new mapmost.ViewshedAnalysis(map);

        //Analysis parameters
        let opt = {
            position: [120.7669270700174, 31.30360462347376, 800],
            pitch: 60,
            bearing: 57,
            fovX: 90,
            fovY: 45,
            distance: 3000,
            visibleColor: "#007f00",
            visibleOpacity: 0.3,
            invisibleColor: "#990000",
            invisibleOpacity: 0.5,
            wireframeColor: "#ffff00",
            wireframeDisplay: true,
            wireframeDensity: 8,
        }

        // Start analysis
        analysis.analyse(opt);
    }

    function remove() {
        //Clear the analysis results, retain the analysis instance, and update the analysis results
        analysis.clear();
    }
    
   </script>
   </body>
   </html>