Intro to ImageryTileLayer

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This sample shows how to add an instance of ImageryTileLayer to a Map in a MapView. The ImageryTileLayer in this sample contains world tiled elevation data. The destination-in composite blendMode is set on the layer. This blend mode masks the contents of the background layer (in this case the world imagery tile layer) where the contents of both layers overlap. Everything else is removed from the result. So the blended result shows the high elevation areas of the world.

                                                                                                                                                                                                                                                     
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no" />
    <title>Intro to ImageryTileLayer | Sample | ArcGIS API for JavaScript 4.19</title>

    <link rel="stylesheet" href="https://js.arcgis.com/4.19/esri/themes/light/main.css" />
    <script src="https://js.arcgis.com/4.19/"></script>

    <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }

    #rendererDiv {
      padding: 10px;
      width: 240px;
    }

    .slider {
      height: 40px;
      width: 100%;
      background-color: transparent;
    }
  </style>
  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/GroupLayer",
      "esri/layers/ImageryTileLayer",
      "esri/layers/TileLayer",
      "esri/renderers/RasterStretchRenderer",
      "esri/widgets/Slider",
      "esri/widgets/BasemapToggle",
      "esri/widgets/LayerList"
    ], (
      Map,
      MapView,
      GroupLayer, ImageryTileLayer, TileLayer,
      RasterStretchRenderer,
      Slider,
      BasemapToggle, LayerList
    ) => (async () => {

      // initial stretch type for the rasterStretchRenderer
      let stretchType = "standard-deviation";


      const url =
        "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer";

      // create a ImageryTileLayer from tiled elevation service
      const layer = new ImageryTileLayer({
        url: url,
        title: "World Elevation ImageryTileLayer",
        blendMode: "destination-in"
      });


      await layer.load();

      layer.renderer = {
        type: "raster-stretch",
        stretchType: "standard-deviation",
        statistics: [layer.rasterInfo.statistics[0]],
        numberOfStandardDeviations: 1,
        colorRamp: {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
      };


      // Create a group layer containing the imagery tile layer and a tile layer
      // this group layer is used to isolate the destination-in blendMode from the
      // rest of the map.
      const groupLayer = new GroupLayer({
        title: "Group Layer",
        layers: [
          new TileLayer({
            url: "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer",
            listMode: "hide-children"
          }),
          layer
        ]
      });


      const map = new Map({
        basemap: "gray-vector",
        layers: [ groupLayer ]
      });

      const view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [84, 31],
        constraints: {
          snapToZoom: false
        }
      });

      view.ui.add(new LayerList({
        view,
        listItemCreatedFunction(event) {
          if (event.item.layer === layer) {
            document.getElementById("rendererDiv").style.display = "block";
            event.item.panel = {
              content: document.getElementById("rendererDiv"),
              open: true,
              className: "esri-icon-maps"
            }
          }
          if (event.item.layer === groupLayer) {
            event.item.open = true;
          }
        }
      }), "top-right")


      // This function is called when the layer view is loaded
      // or when user changes the renderer settings from the UI
      function updateRenderer() {
        // clone the layer renderer
        // layer's renderer needs to be cloned if it changes at runtime
        const renderer = layer.renderer.clone();
        renderer.colorRamp = {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
        const bandStat = layer.rasterInfo.statistics[0];
        renderer.stretchType = stretchType;
        switch (stretchType) {
          case "min-max":
            renderer.statistics = [
              {
                min: valueSlider.values[0],
                max: valueSlider.values[1],
                avg: bandStat.avg,
                stdev: bandStat.stddev
              }
            ];
            break;
          case "standard-deviation":
            renderer.numberOfStandardDeviations = valueSlider.values[0];
            renderer.statistics = [bandStat];
            break;
        }
        // apply the cloned renderer back to the layer's renderer
        // changes will be immediate
        layer.renderer = renderer;
      }


      const sliderLabel = document.getElementById("sliderLabel");
      const stretchTypeSelect = document.getElementById("stretchType");

      // listen to change event on stretchType dropdown
      stretchTypeSelect.addEventListener("change", function () {
        stretchType = stretchTypeSelect.value;
        changeSliderValues(stretchType);
      });

      // This function is called when user selects a stretch type
      // from the dropdown. It sets up raster stretch renderer
      // parameters corresponding to the selected stretch renderer
      function changeSliderValues(stretchType) {
        sliderLabel.innerHTML = `${stretchType} value:`;
        switch (stretchType) {
          case "min-max":
            // code block
            valueSlider.max = 5000;
            valueSlider.min = 0;
            valueSlider.steps = 10;
            valueSlider.values = [120, 3068];
            break;
          case "standard-deviation":
            valueSlider.min = 1;
            valueSlider.max = 3;
            valueSlider.steps = 1;
            valueSlider.values = [1];
            break;
        }
        updateRenderer();
      }

      // set up a new slider to change numeric values
      // corresponding to the stretch renderer parameters
      const valueSlider = new Slider({
        container: "value-slider",
        min: 1,
        max: 3,
        values: [1],
        steps: 1,
        snapOnClickEnabled: false,
        visibleElements: {
          labels: true,
          rangeLabels: true
        }
      });

      valueSlider.on(["thumb-change", "thumb-drag"], updateRenderer);

      view.ui.add(new BasemapToggle({
        view,
        nextBasemap: "dark-gray-vector"
      }),
      "bottom-left");

      window.toggleBlendMode = (event) => {
        layer.blendMode = event.target.checked ? "destination-in" : "normal";
      }
    })());
  </script>
  </head>

  <body>
    <div id="viewDiv"></div>
    <div id="rendererDiv" class="esri-widget">
      <h3 class="esri-widget__heading">Stretch Rendering Parameters</h3>

      <label class="esri-feature-form__label">Select stretch type</label>
      <select id="stretchType" class="esri-input esri-select">
        <option value="standard-deviation" selected>standard deviation</option>
        <option value="min-max">min-max</option>
      </select>
      <br />
      <label id="sliderLabel" class="esri-feature-form__label">standard-deviation value:</label>
      <div id="value-slider" class="slider"></div>
      <input type="checkbox" checked onclick="toggleBlendMode(event)" />
      <label>Toggle blendMode</label>
    </div>
  </body>
</html>

This layer is then added a GroupLayer along with the World Imagery TileLayer to isolate the blending effects set on the ImageryTileLayer from the rest of the map.

                                                                                                                                                                                                                                                     
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no" />
    <title>Intro to ImageryTileLayer | Sample | ArcGIS API for JavaScript 4.19</title>

    <link rel="stylesheet" href="https://js.arcgis.com/4.19/esri/themes/light/main.css" />
    <script src="https://js.arcgis.com/4.19/"></script>

    <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }

    #rendererDiv {
      padding: 10px;
      width: 240px;
    }

    .slider {
      height: 40px;
      width: 100%;
      background-color: transparent;
    }
  </style>
  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/GroupLayer",
      "esri/layers/ImageryTileLayer",
      "esri/layers/TileLayer",
      "esri/renderers/RasterStretchRenderer",
      "esri/widgets/Slider",
      "esri/widgets/BasemapToggle",
      "esri/widgets/LayerList"
    ], (
      Map,
      MapView,
      GroupLayer, ImageryTileLayer, TileLayer,
      RasterStretchRenderer,
      Slider,
      BasemapToggle, LayerList
    ) => (async () => {

      // initial stretch type for the rasterStretchRenderer
      let stretchType = "standard-deviation";


      const url =
        "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer";

      // create a ImageryTileLayer from tiled elevation service
      const layer = new ImageryTileLayer({
        url: url,
        title: "World Elevation ImageryTileLayer",
        blendMode: "destination-in"
      });


      await layer.load();

      layer.renderer = {
        type: "raster-stretch",
        stretchType: "standard-deviation",
        statistics: [layer.rasterInfo.statistics[0]],
        numberOfStandardDeviations: 1,
        colorRamp: {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
      };


      // Create a group layer containing the imagery tile layer and a tile layer
      // this group layer is used to isolate the destination-in blendMode from the
      // rest of the map.
      const groupLayer = new GroupLayer({
        title: "Group Layer",
        layers: [
          new TileLayer({
            url: "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer",
            listMode: "hide-children"
          }),
          layer
        ]
      });


      const map = new Map({
        basemap: "gray-vector",
        layers: [ groupLayer ]
      });

      const view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [84, 31],
        constraints: {
          snapToZoom: false
        }
      });

      view.ui.add(new LayerList({
        view,
        listItemCreatedFunction(event) {
          if (event.item.layer === layer) {
            document.getElementById("rendererDiv").style.display = "block";
            event.item.panel = {
              content: document.getElementById("rendererDiv"),
              open: true,
              className: "esri-icon-maps"
            }
          }
          if (event.item.layer === groupLayer) {
            event.item.open = true;
          }
        }
      }), "top-right")


      // This function is called when the layer view is loaded
      // or when user changes the renderer settings from the UI
      function updateRenderer() {
        // clone the layer renderer
        // layer's renderer needs to be cloned if it changes at runtime
        const renderer = layer.renderer.clone();
        renderer.colorRamp = {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
        const bandStat = layer.rasterInfo.statistics[0];
        renderer.stretchType = stretchType;
        switch (stretchType) {
          case "min-max":
            renderer.statistics = [
              {
                min: valueSlider.values[0],
                max: valueSlider.values[1],
                avg: bandStat.avg,
                stdev: bandStat.stddev
              }
            ];
            break;
          case "standard-deviation":
            renderer.numberOfStandardDeviations = valueSlider.values[0];
            renderer.statistics = [bandStat];
            break;
        }
        // apply the cloned renderer back to the layer's renderer
        // changes will be immediate
        layer.renderer = renderer;
      }


      const sliderLabel = document.getElementById("sliderLabel");
      const stretchTypeSelect = document.getElementById("stretchType");

      // listen to change event on stretchType dropdown
      stretchTypeSelect.addEventListener("change", function () {
        stretchType = stretchTypeSelect.value;
        changeSliderValues(stretchType);
      });

      // This function is called when user selects a stretch type
      // from the dropdown. It sets up raster stretch renderer
      // parameters corresponding to the selected stretch renderer
      function changeSliderValues(stretchType) {
        sliderLabel.innerHTML = `${stretchType} value:`;
        switch (stretchType) {
          case "min-max":
            // code block
            valueSlider.max = 5000;
            valueSlider.min = 0;
            valueSlider.steps = 10;
            valueSlider.values = [120, 3068];
            break;
          case "standard-deviation":
            valueSlider.min = 1;
            valueSlider.max = 3;
            valueSlider.steps = 1;
            valueSlider.values = [1];
            break;
        }
        updateRenderer();
      }

      // set up a new slider to change numeric values
      // corresponding to the stretch renderer parameters
      const valueSlider = new Slider({
        container: "value-slider",
        min: 1,
        max: 3,
        values: [1],
        steps: 1,
        snapOnClickEnabled: false,
        visibleElements: {
          labels: true,
          rangeLabels: true
        }
      });

      valueSlider.on(["thumb-change", "thumb-drag"], updateRenderer);

      view.ui.add(new BasemapToggle({
        view,
        nextBasemap: "dark-gray-vector"
      }),
      "bottom-left");

      window.toggleBlendMode = (event) => {
        layer.blendMode = event.target.checked ? "destination-in" : "normal";
      }
    })());
  </script>
  </head>

  <body>
    <div id="viewDiv"></div>
    <div id="rendererDiv" class="esri-widget">
      <h3 class="esri-widget__heading">Stretch Rendering Parameters</h3>

      <label class="esri-feature-form__label">Select stretch type</label>
      <select id="stretchType" class="esri-input esri-select">
        <option value="standard-deviation" selected>standard deviation</option>
        <option value="min-max">min-max</option>
      </select>
      <br />
      <label id="sliderLabel" class="esri-feature-form__label">standard-deviation value:</label>
      <div id="value-slider" class="slider"></div>
      <input type="checkbox" checked onclick="toggleBlendMode(event)" />
      <label>Toggle blendMode</label>
    </div>
  </body>
</html>

The sample also shows how to leverage client-side rendering by changing the parameters of the RasterStretchRenderer set on the imagery tile layer. The user can update the RasterStretchRenderer parameters at runtime and see the changes immediately. To change the renderer properties, you must first clone the renderer, then change the property, and then set the new renderer back on the layer. The updateRenderer function in the sample is called whenever the user changes the renderer properties by interacting with the user interface.

                                                                                                                                                                                                                                                     
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no" />
    <title>Intro to ImageryTileLayer | Sample | ArcGIS API for JavaScript 4.19</title>

    <link rel="stylesheet" href="https://js.arcgis.com/4.19/esri/themes/light/main.css" />
    <script src="https://js.arcgis.com/4.19/"></script>

    <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }

    #rendererDiv {
      padding: 10px;
      width: 240px;
    }

    .slider {
      height: 40px;
      width: 100%;
      background-color: transparent;
    }
  </style>
  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/GroupLayer",
      "esri/layers/ImageryTileLayer",
      "esri/layers/TileLayer",
      "esri/renderers/RasterStretchRenderer",
      "esri/widgets/Slider",
      "esri/widgets/BasemapToggle",
      "esri/widgets/LayerList"
    ], (
      Map,
      MapView,
      GroupLayer, ImageryTileLayer, TileLayer,
      RasterStretchRenderer,
      Slider,
      BasemapToggle, LayerList
    ) => (async () => {

      // initial stretch type for the rasterStretchRenderer
      let stretchType = "standard-deviation";


      const url =
        "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer";

      // create a ImageryTileLayer from tiled elevation service
      const layer = new ImageryTileLayer({
        url: url,
        title: "World Elevation ImageryTileLayer",
        blendMode: "destination-in"
      });


      await layer.load();

      layer.renderer = {
        type: "raster-stretch",
        stretchType: "standard-deviation",
        statistics: [layer.rasterInfo.statistics[0]],
        numberOfStandardDeviations: 1,
        colorRamp: {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
      };


      // Create a group layer containing the imagery tile layer and a tile layer
      // this group layer is used to isolate the destination-in blendMode from the
      // rest of the map.
      const groupLayer = new GroupLayer({
        title: "Group Layer",
        layers: [
          new TileLayer({
            url: "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer",
            listMode: "hide-children"
          }),
          layer
        ]
      });


      const map = new Map({
        basemap: "gray-vector",
        layers: [ groupLayer ]
      });

      const view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [84, 31],
        constraints: {
          snapToZoom: false
        }
      });

      view.ui.add(new LayerList({
        view,
        listItemCreatedFunction(event) {
          if (event.item.layer === layer) {
            document.getElementById("rendererDiv").style.display = "block";
            event.item.panel = {
              content: document.getElementById("rendererDiv"),
              open: true,
              className: "esri-icon-maps"
            }
          }
          if (event.item.layer === groupLayer) {
            event.item.open = true;
          }
        }
      }), "top-right")


      // This function is called when the layer view is loaded
      // or when user changes the renderer settings from the UI
      function updateRenderer() {
        // clone the layer renderer
        // layer's renderer needs to be cloned if it changes at runtime
        const renderer = layer.renderer.clone();
        renderer.colorRamp = {
          type: "algorithmic",
          fromColor: [0,0,0,0],
          toColor: [0,0,0,1]
        }
        const bandStat = layer.rasterInfo.statistics[0];
        renderer.stretchType = stretchType;
        switch (stretchType) {
          case "min-max":
            renderer.statistics = [
              {
                min: valueSlider.values[0],
                max: valueSlider.values[1],
                avg: bandStat.avg,
                stdev: bandStat.stddev
              }
            ];
            break;
          case "standard-deviation":
            renderer.numberOfStandardDeviations = valueSlider.values[0];
            renderer.statistics = [bandStat];
            break;
        }
        // apply the cloned renderer back to the layer's renderer
        // changes will be immediate
        layer.renderer = renderer;
      }


      const sliderLabel = document.getElementById("sliderLabel");
      const stretchTypeSelect = document.getElementById("stretchType");

      // listen to change event on stretchType dropdown
      stretchTypeSelect.addEventListener("change", function () {
        stretchType = stretchTypeSelect.value;
        changeSliderValues(stretchType);
      });

      // This function is called when user selects a stretch type
      // from the dropdown. It sets up raster stretch renderer
      // parameters corresponding to the selected stretch renderer
      function changeSliderValues(stretchType) {
        sliderLabel.innerHTML = `${stretchType} value:`;
        switch (stretchType) {
          case "min-max":
            // code block
            valueSlider.max = 5000;
            valueSlider.min = 0;
            valueSlider.steps = 10;
            valueSlider.values = [120, 3068];
            break;
          case "standard-deviation":
            valueSlider.min = 1;
            valueSlider.max = 3;
            valueSlider.steps = 1;
            valueSlider.values = [1];
            break;
        }
        updateRenderer();
      }

      // set up a new slider to change numeric values
      // corresponding to the stretch renderer parameters
      const valueSlider = new Slider({
        container: "value-slider",
        min: 1,
        max: 3,
        values: [1],
        steps: 1,
        snapOnClickEnabled: false,
        visibleElements: {
          labels: true,
          rangeLabels: true
        }
      });

      valueSlider.on(["thumb-change", "thumb-drag"], updateRenderer);

      view.ui.add(new BasemapToggle({
        view,
        nextBasemap: "dark-gray-vector"
      }),
      "bottom-left");

      window.toggleBlendMode = (event) => {
        layer.blendMode = event.target.checked ? "destination-in" : "normal";
      }
    })());
  </script>
  </head>

  <body>
    <div id="viewDiv"></div>
    <div id="rendererDiv" class="esri-widget">
      <h3 class="esri-widget__heading">Stretch Rendering Parameters</h3>

      <label class="esri-feature-form__label">Select stretch type</label>
      <select id="stretchType" class="esri-input esri-select">
        <option value="standard-deviation" selected>standard deviation</option>
        <option value="min-max">min-max</option>
      </select>
      <br />
      <label id="sliderLabel" class="esri-feature-form__label">standard-deviation value:</label>
      <div id="value-slider" class="slider"></div>
      <input type="checkbox" checked onclick="toggleBlendMode(event)" />
      <label>Toggle blendMode</label>
    </div>
  </body>
</html>