Digital Surface & Terrain Modelling
Generating Digital Surface and Terrain Models (DSM & DTM) from drone data can be quickly and accurately calculated via photogrammetric of LiDAR methods. The pointclouds generated from matched points on imagery are often more dense than traditional laser scanning and have the advantage of being automatically coloured. Pointclouds can be classified into various categories that help distinguish terrain features. Ground levels are further refined by editing the DTM directly in a 3d environment and later decimated to reduce file sizes.