QT Modeler provides a valuable Line of Sight/Viewshed Analysis tool. The first step in building a Line of Sight model is to establish a viewpoint. In the image of the Hoover Dam above, the viewpoint is "Lookout 1" and is marked by the red marker. Note: Applied Imagery has no knowledge of security procedures at the Hoover Dam. This example is for illustration only.

Go to Line of Sight Step 2