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Authors: Stramondo, S.*
Bignami, C.*
Chini, M.*
Pierdicca, N.*
Tertulliani, A.*
Title: Satellite radar and optical remote sensing for earthquake damage detection: results from different case studies
Title of journal: International Journal of Remote Sensing
Series/Report no.: 20/27 (2006)
Publisher: Taylor & Francis
Issue Date: 20-Oct-2006
DOI: 10.1080/01431160600675895
Keywords: InSAR
damage detection
Optical data
Urban areas
Abstract: In case of a seismic event, a fast and draft damage map of the hit urban areas can be very useful, in particular when the epicentre of the earthquake is located in remote regions, or the main communication systems are damaged. Our aim is to analyse the capability of remote sensing techniques for damage detection in urban areas and to explore the combined use of radar (SAR) and optical satellite data. Two case studies have been proposed: Izmit (1999; Turkey) and Bam (2003; Iran). Both areas have been affected by strong earthquakes causing heavy and extended damage in the urban settlements close to the epicentre. Different procedures for damage assessment have been successfully tested, either to perform a pixel by pixel classification or to assess damage within homogeneous extended areas. We have compared change detection capabilities of different features extracted from optical and radar data, and analysed the potential of combining measurements at different frequency ranges. Regarding the Izmit case, SAR features alone have reached 70% of correct classification of damaged areas and 5 m panchromatic optical images have given 82%; the fusion of SAR and optical data raised up to 89% of correct pixel‐to‐pixel classification. The same procedures applied to the Bam test case achieved about 61% of correct classification from SAR alone, 70% from optical data, while data fusion reached 76%. The results of the correlation between satellite remote sensing and ground surveys data have been presented by comparing remotely change detection features averaged within homogeneous blocks of buildings with ground survey data.
Appears in Collections:04.03.09. Instruments and techniques
04.03.07. Satellite geodesy
04.06.11. Seismic risk
04.03.06. Measurements and monitoring
04.06.06. Surveys, measurements, and monitoring
Papers Published / Papers in press
Papers Published / Papers in press

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IJRS_Stramondo_damage.docmanuscript5.74 MBMicrosoft WordView/Open

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