Automated Assessment of Digital Terrain Models Derived From Airborne Laser Scanning
نویسندگان
چکیده
منابع مشابه
Detecting Terrain Stoniness From Airborne Laser Scanning Data †
Three methods to estimate the presence of ground surface stones from publicly available Airborne Laser Scanning (ALS) point clouds are presented. The first method approximates the local curvature by local linear multi-scale fitting, and the second method uses Discrete-Differential Gaussian curvature based on the ground surface triangulation. The third baseline method applies Laplace filtering t...
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The approach of using an airborne laser scanning for DTM generation has made great progress recently. However, it is not always clear the reliability and the quality of the geometry that characterise the generated DTM. Thus, a special test was conducted to assess the quality and the reliability of the generated DTM via an airborne laser scanning system. To perform this test, an airborne laser s...
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It has been suggested that airborne laser scanning (ALS) could be used for operational monitoring of vegetation changes in the alpine tree line caused by climate change. Because the vegetation is low in such tree-less areas close to the alpine zone, the accuracy of the digital terrain model (DTM) becomes crucial for early detection of, e.g., pioneer trees representing an ongoing tree migration ...
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Since Airborne laser scanning sensors are operational and the data capture, including the calculation of the exterior orientation by using GPS and INS, has reached a high level of automation, the focus has turned on the development of algorithms to extract information from the 3D point cloud. The main tasks are the derivation of terrain information, forest parameters or the extraction of buildi...
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Airborne laser scanning (ALS) is increasingly being used to enhance the accuracy of biomass estimates in tropical forests. Although the technological development of ALS instruments has resulted in ever-greater pulse densities, studies in boreal and sub-boreal forests have shown consistent results even at relatively small pulse densities. The objective of the present study was to assess the effe...
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ژورنال
عنوان ژورنال: Photogrammetrie - Fernerkundung - Geoinformation
سال: 2012
ISSN: 1432-8364
DOI: 10.1127/1432-8364/2012/0105