Validation of DEMs derived from high resolution sar data: a case study on barcelona

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dc.identifier.uri http://dx.doi.org/10.15488/5051
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/5095
dc.contributor.author Sefercik, Umut G.
dc.contributor.author Schunert, Alexander
dc.contributor.author Soergel, Uwe
dc.contributor.author Watanabe, Kinichiro
dc.date.accessioned 2019-06-27T08:47:48Z
dc.date.available 2019-06-27T08:47:48Z
dc.date.issued 2012
dc.identifier.citation Sefercik, Umut G.; Schunert, Alexander; Soergel, Uwe; Watanabe, Kinichiro: Validation of DEMs derived from high resolution sar data: a case study on barcelona. In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences I-7 (2012), Nr. 1, S. 49-54. DOI: https://doi.org/10.5194/isprsannals-i-7-49-2012
dc.description.abstract In recent years, Synthetic Aperture Radar (SAR) data have been widely used for scientific applications and several SAR missions were realized. The active sensor principle and the signal wavelength in the order of centimeters provide all-day and all-weather capabilities, respectively. The modern German TerraSAR-X (TSX) satellite provides high spatial resolution down to one meter. Based on such data SAR Interferometry may yield high quality digital surface models (DSMs), which includes points located on 3d objects such as vegetation, forest, and elevated man-made structures. By removing these points, digital elevation model (DEM) representing the bare ground of Earth is obtained. The primary objective of this paper is the validation of DEMs obtained from TSX SAR data covering Barcelona area, Spain, in the framework of a scientific project conducted by ISPRS Working Group VII/2 "SAR Interferometry" that aims the evaluation of DEM derived from data of modern SAR satellite sensors. Towards this purpose, a DSM was generated with 10 m grid spacing using TSX StripMap mode SAR data and converted to a DEM by filtering. The accuracy results have been presented referring the comparison with a more accurate (10 cm–1 m) digital terrain model (DTM) derived from large scale photogrammetry. The results showed that the TSX DEM is quite coherent with the topography and the accuracy is in between ±8–10 m. As another application, the persistent scatterer interferometry (PSI) was conducted using TSX data and the outcomes were compared with a 3d city model available in Google Earth, which is known to be very precise because it is based on LIDAR data. The results showed that PSI outcomes are quite coherent with reference data and the RMSZ of differences is around 2.5 m. eng
dc.language.iso eng
dc.publisher Göttingen : Copernicus GmbH
dc.relation.ispartof XXII ISPRS Congress, 25 August – 01 September 2012, Melbourne, Australia
dc.relation.ispartofseries ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences I-7 (2012), Nr. 1
dc.rights CC BY 3.0
dc.rights.uri https://creativecommons.org/licenses/by/3.0/
dc.subject Photogrammetry eng
dc.subject Metre (music) eng
dc.subject Interferometry eng
dc.subject Digital elevation model eng
dc.subject Grid eng
dc.subject Image resolution eng
dc.subject Computer science eng
dc.subject Lidar eng
dc.subject Remote sensing eng
dc.subject Synthetic aperture radar eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title Validation of DEMs derived from high resolution sar data: a case study on barcelona
dc.type article
dc.type conferenceObject
dc.type Text
dc.relation.issn 2194-9050
dc.relation.doi https://doi.org/10.5194/isprsannals-i-7-49-2012
dc.bibliographicCitation.issue 1
dc.bibliographicCitation.volume I-7
dc.bibliographicCitation.firstPage 49
dc.bibliographicCitation.lastPage 54
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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