Volumetric forest change detection through VHR satellite imagery

Devrim Akca, Efstratios Stylianidis, Konstantinos Smagas, M.H. Höfer, Daniela Poli, Armin Gruen, Victor Sanchez, Orhan Altan, Andreas Walli, Elisa Jimeno, Alejandro García

Research output: Contribution to conferencePaperAcademic

2 Citations (Scopus)
73 Downloads (Pure)


Quick and economical ways of detecting of planimetric and volumetric changes of forest areas are in high demand. A research platform, called FORSAT (A satellite processing platform for high resolution forest assessment), was developed for the extraction of 3D geometric information from VHR (very-high resolution) imagery from satellite optical sensors and automatic change detection. This 3D forest information solution was developed during a Eurostars project. FORSAT includes two main units. The first one is dedicated to the geometric and radiometric processing of satellite optical imagery and 2D/3D information extraction. This includes: image radiometric pre-processing, image and ground point measurement, improvement of geometric sensor orientation, quasiepipolar image generation for stereo measurements, digital surface model (DSM) extraction by using a precise and robust image matching approach specially designed for VHR satellite imagery, generation of orthoimages, and 3D measurements in single images using mono-plotting and in stereo images as well as triplets. FORSAT supports most of the VHR optically imagery commonly used for civil applications: IKONOS, OrbView–3, SPOT–5 HRS, SPOT–5 HRG, QuickBird, GeoEye-1, WorldView-1/2, Pléiades 1A/1B, SPOT 6/7, and sensors of similar type to be expected in the future. The second unit of FORSAT is dedicated to 3D surface comparison for change detection. It allows users to import digital elevation models (DEMs), align them using an advanced 3D surface matching approach and calculate the 3D differences and volume changes between epochs.
Original languageEnglish
Number of pages8
Publication statusPublished - 19 Jul 2016
EventThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences: XXIII ISPRS Congress - Prague, Czech Republic
Duration: 12 Jul 201619 Jul 2016


ConferenceThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Country/TerritoryCzech Republic


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