How to use the Viewshed functionality.
A viewshed is the area of visibility of an observed object(s), or conversely, the area that can be seen from an observer location(s). The sample demonstrates:
shows the area visible from at least one observer location (does not indicate by how many observers each point can be seen),
shows the visible area colorized according to the number of observers which can see each point,
indicates the minimum height that must be added to a nonvisible point to make it visible by at least one observer.
This sample illustrates use of:
| Name || Description
|TGIS_Viewshed||Viewshed, above-ground-level (AGL), and Fresnel zone clearance generator.
This sample is available on following platforms (click to see source code):