Deriving information from data
Use the ArcGIS Spatial Analyst extension to create a rich set of informative maps from your data. Create a hillshade to use as a backdrop of the terrain to support other data layers. Calculate slope, aspect, and contours, or create a map displaying visibility. Use derived data together to help solve spatial problems.
The following viewshed analysis determines whether an arson suspect would have been able to see the flames from the phone booth where he made a 911 call. Areas in yellow identify the locations from where the fire would have been seen. This visibility analysis demonstrates that the arson suspect could not have seen the flames from the phone booth.