Digital terrain model is applicable for many possibilities related to aerial works by use of photogrammetry or
laser scanning of the earth’s surface. For the purpose of this research we consider just laser scanning used for work in difficult
mountain terrain. The terrain of the Slovak Republic has many high hills and it signifies more complex flight planning,
as laser scanning is usually flown in lower heights than photogrammetry. Moreover, as lower height is above terrain
than the overlap between subsequent LIDAR strips is also lower. This situation can also lead towards the negative value in
extreme instances.
This paper also describes the most effective way for flight planning during laser scanning of mountain terrain by comparison
of two different technologies from operational and economical point of view.
