Airplanes and helicopters

Hyperspectral remote sensing survey, map of vegetation classes, fuel mass distribution maps.

Delineation and redefinition of the SHA.

Georeferenced image of the visibility

Georeferenced lines delineating the narrow tracks and paths.

Georeferenced polygons circling the fortifications or lines delineating them.

Ranking of images according to the possible presence of a trench.
Georeferenced lines delineating sections of the trenches.

Georeferenced terrain features : peaks and depressions.

Georeferenced polygons or lines delineating the dry walls.

By using the nDSM, a distinction can be made between high objects (more than 3 meters) and low objects (between 0 and 3 meters) can be made. In addition, by using available pictures (satellite or 3K) we can select vegetation.
These two processes are then combined to distinguish the high vegetation of the low vegetation.

A normalised Digital Surface Model, result of the difference of the Surface and Terrain Models, highlights off-terrain objects.