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Digital Terrain Model and Orthophoto

The TreeDetect system provides two types of raster outputs for visualizing terrain and canopy structure:
the Digital Terrain Model (DTM) and the Orthophoto.
Both are downloadable as georeferenced .tif files and can also be viewed interactively on the report interface.

Digital Terrain Model (DTM)​

The DTM offers an accurate representation of the terrain surface, filtering out vegetation and above-ground objects.
It can only be generated reliably under leaf-off conditions, when LiDAR or photogrammetry data contain sufficient ground returns for modeling the surface.

Output:

  • Downloadable georeferenced .tif raster file
  • Interactive display on the report interface, selectable as a map layer
  • Compatible with GIS software (e.g., QGIS, ArcGIS)

Orthophoto​

The orthophoto is a distortion-free, georeferenced aerial image showing the true visual appearance of the terrain and canopy.
This output is generated exclusively from photogrammetry, as image-based 3D reconstruction is required to create the aligned mosaic.
Orthophotos can be produced under both leaf-on and leaf-off conditions.

Output:

  • Downloadable high-resolution .tif file
  • Interactive display on the report page, selectable as a map layer
  • Ideal for visual and field-based analysis

✅ Advantage:
The DTM and Orthophoto together provide a complete view — enabling users to analyze both the terrain elevation and the visual characteristics of the surveyed forest area.