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Evaluation of selected methods for extracting digital terrain models from satellite born digital surface models in urban areas

Krauß, Thomas und Arefi, Hossein und Reinartz, Peter (2011) Evaluation of selected methods for extracting digital terrain models from satellite born digital surface models in urban areas. SMPR2011, 2011-05-18 - 2011-05-19, Tehran, Iran.

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Kurzfassung

For the generation of 3D city models from satellite stereo imagery beyond the generation of digital surface models (DSM) from stereo data the next crucial step is the separation of urban 3D objects from ground. To do this the most common method is the derivation of a so called digital terrain model (DTM) from the DSM. The DTM should ideally contain only the surface of the ground on which the urban objects are located. Since only the surface of the objects can be seen from space, sophisticated methods have to be developed to gain information of the bare ground. In this paper selected methods for the extraction of a DTM from a DSM are described and evaluated. The evaluation is done by applying the methods to synthetically generated DSMs. These synthetical DSMs are a combination of ground and typical urban objects put on top of it. The application of the DTM extraction methods should recover in turn the original ground model as good as possible. Also the sum of the obtained DTM and the profile of the urban objects should reconstruct the original DSM. The profile of the urban objects ist often referenced as normalized digital elevation model (nDEM). But in general the equation DSM = DTM + nDEM is not always valid – especially for buildings situated on the slope of a hill. If the nDEM would simply be the difference of DSM – DTM the slope of the hill – contained in the DTM – will be reflected on the roof of the buildings. So also an advanced method for derivation of the nDEM from DSM and DTM is presented and tested.

elib-URL des Eintrags:https://elib.dlr.de/72731/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Evaluation of selected methods for extracting digital terrain models from satellite born digital surface models in urban areas
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Krauß, ThomasDLR, MF-PBNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Arefi, HosseinDLR, MF-PBNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Reinartz, PeterDLR, MF-PBNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:18 Mai 2011
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-7
Status:veröffentlicht
Stichwörter:digital surface models, digital terrain models, urban areas, simulation
Veranstaltungstitel:SMPR2011
Veranstaltungsort:Tehran, Iran
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:18 Mai 2011
Veranstaltungsende:19 Mai 2011
Veranstalter :ISPRS & DLR
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben hochauflösende Fernerkundungsverfahren (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > Photogrammetrie und Bildanalyse
Hinterlegt von: Krauß, Thomas
Hinterlegt am:13 Dez 2011 10:57
Letzte Änderung:24 Apr 2024 19:38

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