Digital Terrain Models (DEM – DTM – DSM)


Airborne 3D laser scanning is the only surveying method that can provide sufficiently dense elevation data of forested terrain, mapping with great accuracy (i.e. multiple points per square meter) the ground beneath forests. High-resolution terrain (DTM) and surface (DSM) models are created by applying class filtering to return pulses, and are available with regard to customers’ exact specifications. Digital models of terrain surfaces and object surfaces (e.g. bare earth, city models, vegetation models) can be provided in different grid sizes for a large variety of applications. We apply rigorous quality-control procedures along each step of the processing way, and required corrections are made to the models when needed.

Applications of Digital Elevation Models

  • Analytical Calculation of Spot Elevations.
  • Slope & Aspect analysis of ground and overhead surfaces.
  • Detailed generation of Contour lines, Breaklines and topographic maps of the study area.
  • Breaklines development for Hydro-flattening of DEM further to Hydro-conditioning and Hydro-enforcement.
  • Determination of characteristics of watershed areas for stormwater and study of: (a) water velocity and flow from rainfall, (b) erosion, (c) sediment deposition locations, (d) flooding, etc.
  • Assessment of landmark visibility for Network RF Planning and Optimization, Signal Transmission & Quality control in Telecommunications domain. Threat Identification via object or vegetation detection adjacent to power lines and poles.
  • Creation of cross-sections and width-wise sections of the ground, aiding in volume calculations for excavation and fill works, determining human interventions on the landscape, monitoring project progress, etc.
  • Analytical determination of Obstacle Limitation Surface Area for the creation of a/c Instrument Approach Procedures.
  • Strategic Urban, Land-Use and Environmental Planning e.g. Simulation of how a new block of buildings can impact total green view index, solar potential of buildings
  • Detailed forest and vegetation mapping with elevation analysis.
  • Tool for decision-making regarding Disaster Management and Response also with Damage Assessment.