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dem

digital elevation model

srtm

mapzen

Digital Elevation Model available on CREODIAS

A Digital Elevation Model (DEM) is a specialized database that represents the relief of a surface between points of known elevation. By interpolating known elevation data from sources such as ground surveys and photogrammetric data capture, a rectangular digital elevation model grid can be created. A DEM can be represented as a raster (a grid of squares, also known as a heightmap when representing elevation) or as a vector-based triangular irregular network (TIN).

DEM can be used in numerous cases, such as:

  • Rendering of 3D visualizations
  • Creating relief maps
  • Extracting terrain parameters for geomorphology
  • Modeling water flow for hydrology or mass movement
  • Modeling soils wetness
  • 3D flight planning
  • Creating physical models
  • Rectification of aerial photography or satellite imagery
  • Terrain correction of gravity measurements
  • Terrain analysis in geomorphology and physical geography
  • Geographic information systems
  • Engineering and infrastructure design
  • Satellite navigation
  • Precision farming and forestry
  • Intelligent transportation systems
  • Archaeology

 

DEM data are represented by two collections:

 

 

The possibilities that DEM provides are of great offer to all that use EO data, and as of December 2018, this data is available on our CREODIAS platform.