Show exploratory line of sight between points

Perform an exploratory line of sight analysis between two points in real time.

Use case

An exploratory line of sight analysis can be used to assess whether a view is obstructed between an observer and a target. Obstructing features could either be natural, like topography, or man-made, like buildings. Consider an events planning company wanting to commemorate a national event by lighting sequential beacons across hill summits or roof tops. To guarantee a successful event, ensuring an unobstructed line of sight between neighboring beacons would allow each beacon to be activated as intended.

Note: This 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 but not persisted. If persisted analysis performed at the full resolution of the data is required, consider using a LineOfSightFunction to perform a line of sight calculation instead.

How to use the sample

Tap on the map to set the observer location. Tap and hold to set the line of sight target. A red segment on the line means the view between observer and target is obstructed, whereas green means the view is unobstructed.

How it works

1. Create an AnalysisOverlay and add it to the scene view.
2. Create an ExploratoryLocationLineOfSight with initial observer and target locations and add it to the analysis overlay.
3. Track the screen taps using the onSingleTapGesture and onLongPressGesture.
4. Use the scene point to update the target location with lineOfSight.targetLocation and the observer location with lineOfSight.observerLocation.

Relevant API

• AnalysisOverlay
• ExploratoryLocationLineOfSight
• SceneView

Tags

3D, exploratory line of sight, visibility, visibility analysis