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The use of aerial images for 3D-geospatial information extraction is a known and precise technology. This technology, called photogrammetry, finds application also in Monitoring tasks of landfill sites. One obtains 3D-geospatial information such as volumes, terrain models, profiles, or contours all of which describe the area in a particular way, either for planning or for documentation purposes. Typically, one associates the capturing of aerial images with use of manned aircraft equipped with large format – nowadays digital – aerial camera systems. As aircrafts serve either fixed wing airplanes or Rotary wing aircrafts.
3D-geospatial information is in many areas a fundamental, operational infrastructure. It serves planning, visualization, documentation and communication of operational processes and is in daily use. Large scale changes of site as well as local changes of volumes are important and constantly to-be-updated spatial data sets. For the Generation of digital surface models in combination with volume determination and change of volume monitoring one lately uses unmanned airborne vehicles (UAV) equipped with cameras. Miniaturization, new materials and technologies permitted construction and use of UAVs for geospatial monitoring tasks. This paper presents several examples of UAV applications for spatial monitoring tasks of landfill sites. The UAVs in use are of less than 5 kg total weight, yet very powerful. The technology behind delivers millions of highly accurate digital surface 3D-points, which thus describe in high detail the existing surface and to a very high degree of realism the actual volume present in the landfill site. Further, this paper gives an overview on this technology and a number of real world application examples.
|Copyright:||© Wasteconsult international|
|Source:||Waste-to-Resources 2015 (May 2015)|
|Autor:||Dr.-Ing. Werner Mayr|
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