Visibility analysis

General info
Scale: 
1/25 000 to 1/250
Spatial resolution: 
10 to 0.05m
Required processing: 
Correction and smoothing of DEM, extraction of visibility points (relative min and max of the area), generation of a grid; Launch visibility script over the whole area which computes visibility value from all other pixels (CPU time consuming).
Data requirements: 

Digital Elevation Model (DEM)

Georeferenced image of the visibility

Why using remote sensors?: 

The purpose of such analysis is to identify the areas of a region of interest from which the best visibility of the surroundings can be achieved.
Knowing this might of help in reconstructing the military positions and hence in locating possible minefields.