Digital Surface/Terrain Models (DSM/DTM)

Drone digital surface model
Drone digital terrain model
Drone digital surface model

Drone surveys are an ideal way to produce Digital Surface/Terrain Models (DSM/DTM) over a large area or site.

Digital Surface Model (DSM) measures the height values of the first surface on the ground. This includes terrain features, buildings, vegetation and any other objects. It is commonly seen as a canopy model and only 'sees' ground where there is nothing else overtop of it. DSM's provide a topographic model of an area, site or land.

A Digital Terrain Model (DTM) represents the bare ground surface without any objects like plants, trees, buildings etc. We can provide a 3D image of the land’s surfaces showing terrain elevations of ground positions at regularly spaced horizontal intervals. DTMs can be used in a wide range of areas e.g. planning, visualisation, height analysis, sight lines etc.


We can produce the model in any requested grid intervals. Contour lines can also be produced from either the DSM or DTM. 


The DSM/DTM produced using drone technology can created in a number of different formats e.g. raster grid formats (GeoTIFF) or as a point cloud (las/laz).  All of our outputs are compatible with BIM and CAD software.

The benefits of using drone technology can be found on our homepage.