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Very High Resolution Photogrammetric DSMs and True-Orthoimages: 3D-Fault Zone Mapping in Northern Chile

Bucher, Tilman and Zielke, Olaf and Victor, Pia and Lehmann, Frank and Onken, Onno (2012) Very High Resolution Photogrammetric DSMs and True-Orthoimages: 3D-Fault Zone Mapping in Northern Chile. GeoHannover2012, 2012-10-01 - 2012-10-03, Hannover. ISBN ISBN 978-3-510-49228-2.

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Both Digital Surface Models (DSM) and aerial imagery are commonly used to map and assess geologic structures from remote sensing data. Here we present a high-resolution topographic and visual data set from the Atacama fault system (AFS) near Antofagasta, Chile. The data were acquired with the Modular Airborne Camera System – MACS – (Lehmann et al. 2011) developed by the DLR (German Aerospace Center) in Berlin, Germany. Photogrammetric processing including dense image matching with SGM (Hirschmueller, 2008) and orthorectification was conducted using the processing chain at DLR. The data show a very high geometric accuracy which is the basis for multitemporal analysis. The DSM and the co-registered True Ortho Images with 5cm ground resolution permit the identi­cation of very small-scale geomorphic features. The data used are part of an ongoing study on the geologic history of the AFS in Northern Chile in the context of earthquake prediction. A primary step towards assessing time and size of future earthquakes is the identi­cation of earthquake recurrence patterns in the existing seismic record. Geologic and geomorphic data are commonly analyzed for this purpose, reasoned by the lack of sufficiently long historical or instrumental seismic data sets. Until recently, those geomorphic data sets encompassed field observation, local total station surveys, and aerial photography. Over the last decade, LiDAR-based high-resolution topographic data sets (e.g. Zielke et al. 2010) became an additional powerful mean, contributing distinctly to a better understanding of earthquake rupture characteristics (e.g., single-event along-fault slip distribution, along-fault slip accumulation pattern) and their relation to fault geometric complexities. Compared to typical LiDAR-DEM (with ~0.5m grid size), ground resolution of the MACS-DSM is increased by an order of magnitude while the spatial extend of these data set is essentially the same. We present examples of the 5cm resolution data set and further explore resolution capabilities and potential with regards to the aforementioned tectono-geomorphic questions.

Item URL in elib:https://elib.dlr.de/80811/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Very High Resolution Photogrammetric DSMs and True-Orthoimages: 3D-Fault Zone Mapping in Northern Chile
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:p. 231
Series Name:Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften e.V.
ISBN:ISBN 978-3-510-49228-2
Keywords:MACS, remote sensing, surface model, DSM, fault zone, mapping, tectono-geomorphology
Event Title:GeoHannover2012
Event Location:Hannover
Event Type:international Conference
Event Start Date:1 October 2012
Event End Date:3 October 2012
Organizer:Dt. Ges. für Geowiss.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren (old), R - Vorhaben Anwendungn Optik: 3-D, Datenfusion, optische Navigation (old), R - Vorhaben Optische Informationssysteme (old)
Location: Berlin-Adlershof
Institutes and Institutions:Optical Information Systems
Deposited By: Dombrowski, Ute
Deposited On:04 Feb 2013 07:00
Last Modified:24 Apr 2024 19:47

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