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Accuracy assessment of an IKONOS derived DSM over urban and suburban area
Devriendt, Dennis; Goossens, Rudi; Binard, Marc
2007
 

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Keywords :
photogrammetry; urban; digital surface model; IKONOS; photogrammétrie; urbain; modèle numérique de surface
Abstract :
[en] The availability of IKONOS stereo pairs has made it possible to generate Digital Surface Models of IKONOS data. Though it is possible to obtain a DSM from two images with a different viewing angle on the same area, it is preferred to work with products ordered as stereo. Such stereo pairs have images that are made in the same orbital pass, resulting in a much better geometry of the stereo model. In this paper the accuracy of an IKONOS derived DSM of urban areas is assessed, based on DSMs from aerial photography and laser scanning. The quality and accuracy of a DSM derived from IKONOS stereo pairs has been assessed for test zones in two cities, Ghent and Liege. The test zones are characterized by a typical urban morphology (city center, residential, industry). The accuracy has been assessed for each of the different types of urban morphology in the study areas. An error surface is obtained by calculating the difference between the generated IKONOS surface models and reference surface models. This surface is used as a measure for the accuracy of the IKONOS surface model. Reference surface models from different origins are used (aerial photography, lidar, large scale 3D database). For the test zones in Liege, the relation between the DSM accuracy and different land cover types is studied in detail. Also the relation between DSM error and the topography will be investigated.
Research center :
Laboratoire SURFACES
Disciplines :
Earth sciences & physical geography
Author, co-author :
Devriendt, Dennis;  Universiteit Gent - Ugent > Geografie
Goossens, Rudi;  Universiteit Gent - Ugent > Geografie
Binard, Marc ;  Université de Liège - ULiège > Département de géographie > Labo Surfaces - Unité de Géomatique - Geomatics Unit
Language :
English
Title :
Accuracy assessment of an IKONOS derived DSM over urban and suburban area
Alternative titles :
[fr] Évaluation de l’exactitude d’un MNS extrait d’une image IKONOS sur une zone urbaine et sa banlieue
Publication date :
2007
Event name :
26th EARSeL Symposium - New developments and challenges in remote sensing
Event organizer :
EARSeL
Event place :
Warsaw, Poland
Event date :
du 29 mai au 2 juin 2006
Audience :
International
Pages :
649-657
Name of the research project :
SPIDER
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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since 25 January 2009

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