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[WinUI] Display Overview Map (#1730)
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‎src/WinUI/ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap/DisplayOverviewMap.jpg‎

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‎src/WinUI/ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap/DisplayOverviewMap.xaml‎

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<UserControl
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x:Class="ArcGIS.WinUI.Samples.DisplayOverviewMap.DisplayOverviewMap"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:esri="using:Esri.ArcGISRuntime"
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xmlns:esriUI="using:Esri.ArcGISRuntime.UI.Controls"
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xmlns:toolkit="using:Esri.ArcGISRuntime.Toolkit.UI.Controls">
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<Grid>
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<esriUI:MapView x:Name="MyMapView" />
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<toolkit:OverviewMap Width="220"
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Height="220"
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Margin="5"
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HorizontalAlignment="Left"
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VerticalAlignment="Top"
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GeoView="{x:Bind MyMapView}"
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ScaleFactor="10" />
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</Grid>
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</UserControl>

‎src/WinUI/ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap/DisplayOverviewMap.xaml.cs‎

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// Copyright 2026 Esri.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
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// language governing permissions and limitations under the License.
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using Esri.ArcGISRuntime.Data;
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using Esri.ArcGISRuntime.Geometry;
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using Esri.ArcGISRuntime.Mapping;
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using Esri.ArcGISRuntime.Symbology;
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using Esri.ArcGISRuntime.Tasks;
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using Esri.ArcGISRuntime.Tasks.Offline;
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using Esri.ArcGISRuntime.UI;
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using Esri.ArcGISRuntime.ArcGISServices;
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using Esri.ArcGISRuntime.UI.Controls;
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using System;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.UI.Xaml;
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using Microsoft.UI.Xaml.Input;
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namespace ArcGIS.WinUI.Samples.DisplayOverviewMap
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{
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[ArcGIS.Samples.Shared.Attributes.Sample(
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name: "Display overview map",
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category: "Map",
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description: "Include an overview or inset map as an additional map view to show the wider context of the primary view.",
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instructions: "Pan or zoom across the map view to browse through the tourist attractions feature layer and notice the viewpoint and scale of the linked overview map update automatically. When running the sample on a desktop, you can also navigate by panning and zooming on the overview map. However, interactivity of the overview map is disabled on mobile devices.",
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tags: new[] { "context", "inset", "map", "minimap", "overview", "preview", "small scale", "toolkit", "view" })]
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[ArcGIS.Samples.Shared.Attributes.OfflineData()]
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public partial class DisplayOverviewMap
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{
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// URL to the feature service.
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private const string FeatureServiceUrl = "https://services6.arcgis.com/Do88DoK2xjTUCXd1/arcgis/rest/services/OSM_Tourism_NA/FeatureServer/0";
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// Hold a reference to the feature table.
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private ServiceFeatureTable _featureTable;
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public DisplayOverviewMap()
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{
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InitializeComponent();
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_ = Initialize();
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}
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private async Task Initialize()
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{
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// Create new Map with basemap.
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MyMapView.Map = new Map(BasemapStyle.ArcGISTopographic);
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// Set the initial map location.
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MyMapView.SetViewpoint(new Viewpoint(49.28299, -123.12052, 70000));
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// Create the feature table, referring to the feature service.
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_featureTable = new ServiceFeatureTable(new Uri(FeatureServiceUrl));
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// Create a feature layer to visualize the features in the table.
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FeatureLayer featureLayer = new FeatureLayer(_featureTable);
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// Add the layer to the map.
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MyMapView.Map.OperationalLayers.Add(featureLayer);
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}
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}
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}

‎src/WinUI/ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap/readme.md‎

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# Display overview map
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Include an overview or inset map as an additional map view to show the wider context of the primary view.
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![Image of display overview map](DisplayOverviewMap.jpg)
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## Use case
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An overview map provides a useful, smaller-scale overview of the current map view's location. For example, when you need to inspect a layer with many features while remaining aware of the wider context of the view, use an overview map to help show the extent of the main map view.
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## How to use the sample
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Pan or zoom across the map view to browse through the tourist attractions feature layer and notice the viewpoint and scale of the linked overview map update automatically. When running the sample on a desktop, you can also navigate by panning and zooming on the overview map. However, interactivity of the overview map is disabled on mobile devices.
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## How it works
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1. Create a `Map` with the `ArcGISTopographic` basemap style and add it to the `MapView`.
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2. Instantiate a `FeatureLayer` from a `ServiceFeatureTable` and append it to the `Map`'s operational layers.
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3. In the user-interface, declare an `OverviewMap` object from the ArcGIS Maps SDK for .NET Toolkit.
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4. Assign the `MapView` to the `MyOverviewMap.GeoView` property of the `OverviewMap` to connect the `MapView` with the `OverviewMap`.
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5. Set the scale factor of the `OverviewMap` with the `MyOverviewMap.ScaleFactor`.
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## Relevant API
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* MapView
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* OverviewMap
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## About the data
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The data used in this sample is the [OpenStreetMap Tourist Attractions for North America](https://www.arcgis.com/home/item.html?id=addaa517dde346d1898c614fa91fd032) feature layer, which is scale-dependent and displays at scales larger than 1:160,000.
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## Additional information
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This sample uses the overview map toolkit component which can be accessed using the Esri.ArcGISRuntime.Toolkit nuget package. The [toolkit](https://github.com/Esri/arcgis-toolkit-dotnet) can also be cloned and set up locally. For information about setting up the toolkit, visit the [repository](https://github.com/Esri/arcgis-toolkit-dotnet/blob/main/README.md).
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## Tags
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context, inset, map, minimap, overview, preview, small scale, toolkit, view

‎src/WinUI/ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap/readme.metadata.json‎

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{
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"category": "Map",
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"description": "Include an overview or inset map as an additional map view to show the wider context of the primary view.",
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"formal_name": "DisplayOverviewMap",
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"ignore": false,
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"images": [
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"DisplayOverviewMap.jpg"
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],
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"keywords": [
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"context",
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"inset",
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"map",
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"minimap",
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"overview",
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"preview",
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"small scale",
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"toolkit",
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"view"
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],
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"offline_data": [],
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"redirect_from": [
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"/net/latest/maui/sample-code/display-overview-map.htm"
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],
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"relevant_apis": [
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"MapView",
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"OverviewMap"
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],
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"snippets": [
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"DisplayOverviewMap.xaml.cs",
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"DisplayOverviewMap.xaml"
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],
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"title": "Display overview map"
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}

‎src/WinUI/readme.md‎

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* [Create and save map](ArcGIS.WinUI.Viewer/Samples/Map/AuthorMap) - Create and save a map as an ArcGIS `PortalItem` (i.e. web map).
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* [Create dynamic basemap gallery](ArcGIS.WinUI.Viewer/Samples/Map/CreateDynamicBasemapGallery) - Implement a basemap gallery that automatically retrieves the latest customization options from the basemap styles service.
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* [Display map](ArcGIS.WinUI.Viewer/Samples/Map/DisplayMap) - Display a map with an imagery basemap.
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* [Display overview map](ArcGIS.WinUI.Viewer/Samples/Map/DisplayOverviewMap) - Include an overview or inset map as an additional map view to show the wider context of the primary view.
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* [Download preplanned map area](ArcGIS.WinUI.Viewer/Samples/Map/DownloadPreplannedMap) - Take a map offline using a preplanned map area.
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* [Generate offline map](ArcGIS.WinUI.Viewer/Samples/Map/GenerateOfflineMap) - Take a web map offline.
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* [Generate offline map (overrides)](ArcGIS.WinUI.Viewer/Samples/Map/GenerateOfflineMapWithOverrides) - Take a web map offline with additional options for each layer.

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