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3 results on '"Caspard, Mathilde"'

1. ASAPTERRA - Advancing SAR and Optical Methods for Rapid Mapping

Author

Martinis, Sandro, Clandillon, Stephen, Plank, Simon, Twele, André, Huber, Claire, Caspard, Mathilde, Maxant, Jérôme, Cao, Wenxi, Haouet, Sadri, and Fuchs, Eva-Maria

Subjects
landslides, Rapid mapping, natural hazards, floods, ALOS-2/PALSAR-2, fires, Sentinel-1, Pléiades, Georisiken und zivile Sicherheit, Sentinel-2, TerraSAR-X
Abstract

Optical and radar satellite remote sensing have proven to provide essential crisis information in case of natural disasters, humanitarian relief activities and civil security issues in a growing number of cases through mechanisms such as the Copernicus Emergency Management Service (EMS) of the European Commission or the International Charter ‘Space and Major Disasters’. The aforementioned programs and initiatives make use of satellite-based rapid mapping services aimed at delivering reliable and accurate crisis information after natural hazards. Although these services are increasingly operational, they need to be continuously updated and improved through research and development (R&D) activities. The principal objective of ASAPTERRA (Advancing SAR and Optical Methods for Rapid Mapping), the ESA-funded R&D project being described here, is to improve, automate and, hence, speed-up geo-information extraction procedures in the context of natural hazards response. This is performed through the development, implementation, testing and validation of novel image processing methods using optical and Synthetic Aperture Radar (SAR) data. The methods are mainly developed based on data of the German radar satellites TerraSAR-X and TanDEM-X, the French satellite missions Pléiades-1A/1B as well as the ESA missions Sentinel-1/2 with the aim to better characterize the potential and limitations of these sensors and their synergy. The resulting algorithms and techniques are evaluated in real case applications during rapid mapping activities. The project is focussed on three types of natural hazards: floods, landslides and fires.

Published
2017

2. FOREST RECOLONIZATION MONITORING BASED ON HR AND VHR IMAGERY: THE CASE OF THE MAIDO FOREST FIRE EXPLOITING PLÉIADES AND SPOT KALIDEOS DATABASE.

Author

Caspard, Mathilde, Yesou, Hervé, Selle, Arnaud, Tinel, Claire, Tessier, Pierre, Durand, Arnaud, Clandillon, Stephen, and de Fraipont, Paul

Subjects
*FOREST fire research, *VEGETATION mapping, *REMOTE sensing by radar
Abstract

This paper explores the potential of the Pléiades images for the monitoring of the recolonization of Maido Forest in a post-fire framework. This site, located in the heart of the National Park of Reunion and classified as a UNESCO World Heritage Site, has been affected by several wildfires late October 2011, ravaging an area of approximately 2700 ha covered mostly by endemic species. To understand the state and the phenological behavior of pre and post fire vegetation, this study uses the SPOT KALIDEOS archive (since 2005) combined with field information. Then, a series of post-fire Pleiades image acquired from June 2012 to September 2013 plus one pre-event Worldview-2 image were used to assess the contribution of very high spatial resolution to monitor forest recolonization at a plot scale. A total of 66 SPOT and 10 very high resolution (Pléiades and WorldView-2) images have been integrated and exploited. Spectral vegetation indexes like NDVI or TSAVI have been analyzed on multi-temporal series and have highlighted the forest vegetation cycle as well as outside perturbation phases than closer to the event and after. The NRI index allowed characterization and monitoring of post-fire vegetation recolonization. Finally, the texture provided by the very high resolution images helped to confirm vegetation recovery and to qualify this recolonization phenomenon consisting of a vegetation apparently different from the original. [ABSTRACT FROM AUTHOR]

Published
2015
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3. EXPLOITATION DE L'IMAGERIE PLEIADES EN CARTOGRAPHIE REACTIVE SUITE A DES CATASTROPHES NATURELLES AYANT AFFECTE LE TERRITOIRE FRANÇAIS EN 2013.

Author

Yésou, Hervé, Escudier, Aurélie, Battiston, Stéphanie, Dardillac, Jean-Yves, Clandillon, Stephen, Uribe, Carlos, Caspard, Mathilde, Giraud, Henri, Maxant, Jérôme, Durand, Arnaud, Fellah, Kader, Studer, Mathias, Huber, Claire, Philippoteaux, Laurent, de Fraipont, Paul, and Fontannaz, Delphine

Abstract

Copyright of Revue Francaise de Photogrammetrie et de Teledetection is the property of Societe Francaise de Photogrammetrie et de Teledetection and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2015
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