DTM/DSM

Terrain models are based on point clouds obtained during airborne  laser scanning. A Digital Terrain Model (DTM) is a true representation  of the terrain relief. When we supplement it with extra information  about objects on the surface, we can create a Digital Surface Model  (DSM). Being a universal tool, terrain models can be used for  determining slope and elevation, but also for identification of  landforms and discovery or inventory of archaeological objects.