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HTML

              
                <!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
  <title>try/catch OGCFeatureLayer 4.16</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }

    #infoDiv {
      position: absolute;
      top: 15px;
      left: 60px;
    }

    #infoDiv input {
      border: none;
      box-shadow: rgba(0, 0, 0, 0.7) 1px 2px 3px;
      background-color: rgba(218, 204, 255, 1);
      width: 80px;
      height: 65px;
      font-size: 42px;
      color: rgba(76, 76, 76, 1);
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.16/esri/themes/light-purple/main.css" />
  <script src="https://js.arcgis.com/4.16/"></script>

  <script>
    require([
      "esri/views/MapView",
      "esri/views/SceneView",
      "esri/Map",
      "esri/layers/OGCFeatureLayer",
      "esri/layers/VectorTileLayer",
      "esri/Basemap"
    ], function(
      MapView,
      SceneView,
      Map,
      OGCFeatureLayer,
      VectorTileLayer,
      Basemap
    ) {
      // Create the OGCFeatureLayer
      const countries = new OGCFeatureLayer({
        url: "https://vtp2.geo-solutions.it/geoserver/ogc/features", // url to the OGC service
        collectionId: "ne:countries50m", // unique id of the collection
        objectIdField: "NE_ID", // numeric object id
        title: "Countries", // give the layer a shorter title
        copyright: "vtp2.geo-solutions.it",
        // add labeling with each country's name
        labelingInfo: [{
          labelExpressionInfo: {
            expression: "$feature.NAME"
          },
          symbol: {
            type: "text", // autocasts as new TextSymbol()
            color: [76, 76, 76, 1],
            haloSize: 1,
            haloColor: [218, 204, 255, 1],
            font: {
              family: "Amarante",
              style: "normal",
              weight: "normal",
              size: 13
            }
          }
        }],
        // define rendering
        renderer: {
          type: "simple",
          symbol: {
            type: "simple-fill",
            style: "diagonal-cross",
            outline: {
              color: "white",
              width: "0.2px"
            }
          }
        }
      });
      // create map with custom basemap
      const map = new Map({
        basemap: new Basemap({
          baseLayers: [
            new VectorTileLayer({
              portalItem: {
                id: "95dc3d376d1a4ffb91f183814d4a820d"
              }
            })
          ]
        }),
        layers: [countries] // add OGCFeatureLayer
      });
      // app configuration for switching between 2d and 3d
      var switchButton = document.getElementById("switch-btn");
      var appConfig = {
        mapView: null,
        sceneView: null,
        activeView: null,
        container: "viewDiv" // use same container for views
      };
      // set parameters for MapView or SceneView
      var initialViewParams = {
        zoom: 4,
        center: [2, 48],
        container: appConfig.container,
        map: map,
        popup: {
          defaultPopupTemplateEnabled: true
        }
      };
      // create 2D view and and set active
      appConfig.mapView = createView(initialViewParams, "2d");
      appConfig.activeView = appConfig.mapView;
      // create 3D view, won't initialize until container is set
      initialViewParams.container = null;
      appConfig.sceneView = createView(initialViewParams, "3d");
      // switch the view between 2D and 3D each time the button is clicked
      switchButton.addEventListener("click", function() {
        switchView();
      });
      // Switches the view from 2D to 3D and vice versa
      function switchView() {
        var is3D = appConfig.activeView.type === "3d";
        var activeViewpoint = appConfig.activeView.viewpoint.clone();
        // remove the reference to the container for the previous view
        appConfig.activeView.container = null;
        if (is3D) {
          // if the input view is a SceneView, set the viewpoint on the
          // mapView instance. Set the container on the mapView and flag
          // it as the active view
          try {
            console.log("Switching to 2D");
            appConfig.mapView.viewpoint = appConfig.container;
            appConfig.mapView.container = appConfig.mapView;
            appConfig.activeView = activeViewpoint;
            switchButton.value = "3D";
          } catch {
            console.log("Problem switching to 2D. Remaining in 3D.");
            appConfig.sceneView.viewpoint = activeViewpoint;
            appConfig.sceneView.container = appConfig.container;
            appConfig.activeView = appConfig.sceneView;
            switchButton.value = "2D";
          }
        } else {
          try {
            console.log("Switching to 3D");
            appConfig.sceneView.viewpoint = activeViewpoint;
            appConfig.sceneView.container = appConfig.container;
            appConfig.activeView = appConfig.sceneView;
            switchButton.value = "2D";
          } catch {
            console.log("Problem switching to 3D. Remaining in 2D.");
            appConfig.mapView.viewpoint = activeViewpoint;
            appConfig.mapView.container = appConfig.container;
            appConfig.activeView = appConfig.mapView;
            switchButton.value = "3D";
          }
        }
      }
      // convenience function for creating a 2D or 3D view
      function createView(params, type) {
        var view;
        var is2D = type === "2d";
        if (is2D) {
          view = new MapView(params);
          return view;
        } else {
          view = new SceneView(params);
        }
        return view;
      }
    });
  </script>
</head>

<body>
  <div id="viewDiv"></div>
  <div id="infoDiv">
    <input class="esri-component esri-widget--button esri-widget esri-interactive" type="button" id="switch-btn" value="3D" />
  </div>
</body>

</html>
              
            
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