Scene layer selection

Identify features in a scene to select.

Use case

You can select features to visually distinguish them with a selection color or highlighting. This can be useful to demonstrate the physical extent or associated attributes of a feature, or to initiate another action such as centering that feature in the scene view.

How to use the sample

Tap on a building in the scene layer to select it. Deselect buildings by clicking away from the buildings.

How it works

1. Create an ArcGISSceneLayer passing in the URL to a scene layer service.
2. Wait for the user to tap with the sceneView.GeoViewTapped event and get the tapped screen point.
3. Call sceneView.IdentifyLayersAsync(sceneLayer, screenPoint, tolerance, false, 1) to identify features in the scene.
4. From the resulting IdentifyLayerResult, get the list of identified GeoElements with result.GeoElements.
5. Get the first element in the list, checking that it is a feature, and call sceneLayer.SelectFeature(feature) to select it.

Relevant API

• ArcGISSceneLayer
• Scene
• SceneView

About the data

This sample shows a Brest, France Scene hosted on ArcGIS Online.

Tags

3D, Brest, buildings, identify, model, query, search, select

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<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="ArcGISRuntime.Samples.SceneLayerSelection.SceneLayerSelection"
             xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Label Grid.Row="0"
               HorizontalTextAlignment="Center"
               Text="Tap to select buildings." />
        <esriUI:SceneView x:Name="MySceneView"
                          Grid.Row="1"
                          GeoViewTapped="SceneViewTapped" />
    </Grid>
</ContentPage>