Hervé Yésou

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Semi-automatic flood extraction procedures based on change detection techniques appear particularly adapted to plain flood monitoring and mapping. The change detector was specifically elaborated to analyse ENVISAT ASAR Wide Swath Mode data pairs, which appear very well adapted to flood monitoring over wide areas. The algorithm is based on two analysis(More)
Thanks to the International Charter "Space and Major Disasters", rapid mapping of disaster events using EO imagery now has a history. An insight from the viewpoint of a crisis information operator is given on the geo-information service provided within this framework. Action chronology and map products are scrutinized. Finally, the rapid mapping service's(More)
Overabundant growth of emergent lacustrine plants can cause biodiversity, ecosystem service and economic loss. The two-basined Wuchang Lake is a typical small shallow lake within the Yangtze River floodplain. Expansion of the emergent macrophyte Zizania latifolia at Wuchang Lower Lake (to 49 km2 in area, c. 87.0% of Lower Lake) has increasingly denied the(More)
Involved in disaster management support for more than 10 years, SERTIT’s Rapid Mapping Service is specialized in the rapid delivery of crisis information derived from Earth Observation satellite imagery, in particular within the framework of the International Charter “Space and Major Disasters” or European and National emergency programs. This service,(More)
Wetlands, very sensitive and valuable ecosystem can be monitored in terms of water surfaces dynamics as well as vegetation characterisation and monitoring exploiting satellite data. The synergy between the recently launched Sentinel1 and Sentinel2 satellites have been investigated over the Poyang and Anhui lakes in PR China. Results highlight the gain in(More)