NDLI: Burnt area mapping in the European-Mediterranean: SAR backscatter change analysis and synergistic use of optical and SAR data

Content Provider	IEEE Xplore Digital Library
Author	Bernhard, E.-M. Twele, A. Gahler, M.
Copyright Year	2012
Description	Author affiliation: German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), Dpt. Civil Crisis, Information and GeoRisks, 82234 Oberpfaffenhofen, Germany (Bernhard, E.-M.; Twele, A.; Gahler, M.)
Abstract	Optical satellites are commonly the main data source used for burnt area mapping in a rush mode, but data availability can be limited by weather conditions or direct fire effects such as smoke plumes or haze. Thus, our study focused on compensating these shortcomings through the complementary use of SAR data. In order to investigate the potential of TerraSAR-X (ScanSAR and StripMap) data for burnt area mapping, a multi-temporal backscatter coefficient analysis of four different study sites (La Palma, Portugal, Sardinia and Greece) was performed. The backscatter values in the post-disaster images increased significantly in all study sites, whereas VV polarization showed higher difference values than HH polarization. When comparing backscatter values of individual vegetation types (CORINE land cover classification), the absolute backscatter difference of post- and pre-disaster images varied. High growing and dense vegetation showed a larger backscatter change than low growing and sparse vegetation. To provide information about forest fires also during bad weather conditions, a semi-automatic, object-based, fast and transferable algorithm using very high resolution optical as well as SAR data was developed. The optical part of the algorithm is object-based and uses single- or multi-temporal spectral indices. In order to reduce limitations in optical data due to cloud cover, the algorithm also employs change detection techniques (ratio, difference and index calculation) of TerraSAR-X data.
Starting Page	2141
Ending Page	2143
File Size	108625
Page Count	3
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6351080
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Backscatter Fires Vegetation mapping Synthetic aperture radar Optical imaging Optical polarization Optical sensors burnt area detection Forest fire SAR backscatter change analysis
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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