View in WPF WinUI UWP Forms iOS Android View on GitHub
Sample viewer app
Perform a viewshed analysis from a defined vantage point.
Use case
A 3D viewshed analysis is a type of visual analysis you can perform on a scene. The viewshed shows what can be seen from a given location. The output is an overlay with two different colors - one representing the visible areas (green) and the other representing the obstructed areas (red). Viewshed analysis is a form of "exploratory analysis", which means the results are calculated on the current scale of the data, and the results are generated very quickly. If more "conclusive" results are required, consider using a GeoprocessingTask to perform a viewshed instead.
How to use the sample
Use the sliders to change the properties (heading, pitch, etc.), of the viewshed and see them updated in real time.
How it works
Create a LocationViewshed passing in the observer location, heading, pitch, horizontal/vertical angles, and min/max distances.
Set the property values on the viewshed instance for location, direction, range, and visibility properties.
Relevant API
AnalysisOverlay
ArcGISSceneLayer
ArcGISTiledElevationSource
LocationViewshed
Viewshed
About the data
The scene shows a buildings layer in Brest, France hosted on ArcGIS Online.
3D, frustum, scene, viewshed, visibility analysis
ViewshedLocation.xaml ViewshedLocation.xaml ViewshedLocation.xaml.cs Use dark colors for code blocks
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< UserControl x:Class = "ArcGISRuntime.WPF.Samples.ViewshedLocation.ViewshedLocation"
xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:esri = "http://schemas.esri.com/arcgis/runtime/2013" >
< UserControl.Resources >
< Style TargetType = "TextBlock" >
< Setter Property = "Margin" Value = "0,0,5,0" />
< Setter Property = "VerticalAlignment" Value = "Center" />
</ Style >
</ UserControl.Resources >
< Grid >
< esri:SceneView x:Name = "MySceneView" />
< Border Style = "{StaticResource BorderStyle}" >
< Grid >
< Grid.RowDefinitions >
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
< RowDefinition />
</ Grid.RowDefinitions >
< Grid.ColumnDefinitions >
< ColumnDefinition Width = "Auto" />
< ColumnDefinition Width = "*" />
< ColumnDefinition Width = "Auto" />
</ Grid.ColumnDefinitions >
< TextBlock Text = "Tap to pick up the observer, tap again to drop it."
Grid.Row = "0" Grid.Column = "0" Grid.ColumnSpan = "3"
Margin = "0,0,0,10"
TextWrapping = "WrapWithOverflow" TextAlignment = "Center" FontWeight = "SemiBold" />
< TextBlock Text = "Heading"
Grid.Row = "1" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Pitch"
Grid.Row = "2" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Horizontal angle"
Grid.Row = "3" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Vertical angle"
Grid.Row = "4" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Height"
Grid.Row = "5" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Minimum distance"
Grid.Row = "6" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Maximum distance"
Grid.Row = "7" Grid.Column = "0"
HorizontalAlignment = "Right" />
< TextBlock Text = "Frustum visibility"
Grid.Row = "8" Grid.Column = "0" Grid.ColumnSpan = "2"
HorizontalAlignment = "Right" />
< TextBlock Text = "Analysis visibility"
Grid.Row = "9" Grid.Column = "0" Grid.ColumnSpan = "2"
HorizontalAlignment = "Right" />
< Slider x:Name = "HeadingSlider"
Grid.Row = "1" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "0" Maximum = "360"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "PitchSlider"
Grid.Row = "2" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "60" Maximum = "180"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "HorizontalAngleSlider"
Grid.Row = "3" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "75" Maximum = "120" Minimum = "1"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "VerticalAngleSlider"
Grid.Row = "4" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "90" Maximum = "120" Minimum = "1"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "HeightSlider"
Grid.Row = "5" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "10" Maximum = "200" Minimum = "0"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "MinimumDistanceSlider"
Grid.Row = "6" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "5" Maximum = "8999" Minimum = "5"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< Slider x:Name = "MaximumDistanceSlider"
Grid.Row = "7" Grid.Column = "1"
HorizontalAlignment = "Stretch" VerticalAlignment = "Center"
Value = "1500" Minimum = "1" Maximum = "9999"
TickFrequency = "1" IsSnapToTickEnabled = "True"
ValueChanged = "HandleSettingsChange" />
< CheckBox x:Name = "FrustumVisibilityCheck"
Grid.Row = "8" Grid.Column = "2"
Margin = "5" VerticalAlignment = "Center"
Checked = "HandleSettingsChange"
Unchecked = "HandleSettingsChange" />
< CheckBox x:Name = "AnalysisVisibilityCheck"
Grid.Row = "9" Grid.Column = "2"
Margin = "5" VerticalAlignment = "Center"
IsChecked = "True"
Checked = "HandleSettingsChange"
Unchecked = "HandleSettingsChange" />
< Label Content = "{Binding Value, ElementName=HeadingSlider}"
Grid.Row = "1" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=PitchSlider}"
Grid.Row = "2" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=HorizontalAngleSlider}"
Grid.Row = "3" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=VerticalAngleSlider}"
Grid.Row = "4" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=HeightSlider}"
Grid.Row = "5" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=MinimumDistanceSlider}"
Grid.Row = "6" Grid.Column = "2" />
< Label Content = "{Binding Value, ElementName=MaximumDistanceSlider}"
Grid.Row = "7" Grid.Column = "2" />
</ Grid >
</ Border >
</ Grid >
</ UserControl >
