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Proceedings Paper

A new automatic synthetic aperture radar-based flood mapping application hosted on the European Space Agency's Grid Processing of Demand Fast Access to Imagery environment
Author(s): Patrick Matgen; Laura Giustarini; Renaud Hostache
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Paper Abstract

This paper introduces an automatic flood mapping application that is hosted on the Grid Processing on Demand (GPOD) Fast Access to Imagery (Faire) environment of the European Space Agency. The main objective of the online application is to deliver operationally flooded areas using both recent and historical acquisitions of SAR data. Having as a short-term target the flooding-related exploitation of data generated by the upcoming ESA SENTINEL-1 SAR mission, the flood mapping application consists of two building blocks: i) a set of query tools for selecting the “crisis image” and the optimal corresponding “reference image” from the G-POD archive and ii) an algorithm for extracting flooded areas via change detection using the previously selected “crisis image” and “reference image”. Stakeholders in flood management and service providers are able to log onto the flood mapping application to get support for the retrieval, from the rolling archive, of the most appropriate reference image. Potential users will also be able to apply the implemented flood delineation algorithm. The latter combines histogram thresholding, region growing and change detection as an approach enabling the automatic, objective and reliable flood extent extraction from SAR images. Both algorithms are computationally efficient and operate with minimum data requirements. The case study of the high magnitude flooding event that occurred in July 2007 on the Severn River, UK, and that was observed with a moderateresolution SAR sensor as well as airborne photography highlights the performance of the proposed online application. The flood mapping application on G-POD can be used sporadically, i.e. whenever a major flood event occurs and there is a demand for SAR-based flood extent maps. In the long term, a potential extension of the application could consist in systematically extracting flooded areas from all SAR images acquired on a daily, weekly or monthly basis.

Paper Details

Date Published: 25 October 2012
PDF: 7 pages
Proc. SPIE 8538, Earth Resources and Environmental Remote Sensing/GIS Applications III, 853815 (25 October 2012); doi: 10.1117/12.974644
Show Author Affiliations
Patrick Matgen, Ctr. de Recherche Public - Gabriel Lippmann (Luxembourg)
Laura Giustarini, Ctr. de Recherche Public - Gabriel Lippmann (Luxembourg)
Renaud Hostache, Ctr. de Recherche Public - Gabriel Lippmann (Luxembourg)


Published in SPIE Proceedings Vol. 8538:
Earth Resources and Environmental Remote Sensing/GIS Applications III
Shahid Habib; David Messinger; Antonino Maltese; Ulrich Michel; Daniel L. Civco; Manfred Ehlers; Karsten Schulz; Konstantinos G. Nikolakopoulos, Editor(s)

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