First assessment of SPOT5 ability to map coastal benthic habitats: application to the Chausey Islands, English Channel.

Adeline Cotonnec (1) , Jérôme Fournier (2) , Pascal Gouéry (1) , Mouna Mokrani (1) , Brice Anselme (2) , Alain Dréau (2) , Vincent Dubreuil (1) , Andrea Panizza (1)

1 LETG - Rennes - Littoral, Environnement, Télédétection, Géomatique
2 PRODIG - Pôle de recherche pour l'organisation et la diffusion de l'information géographique

Recent coastal pollutions have induced local and national authorities to evaluate present mapping techniques and to assess their ability to map coastal benthic habitats. Within these research programs a test site has been choosen to evaluate data from the High Spatial Resolution Satelite SPOT5. It is the Chausey archipelago, in the English Channel which is characterized by a very wide macro tidal shore line with many skerries and very small islands. Such a rugged inter- and subtidal topography makes it a very demanding site for cartography. SPOT5 data has been classified (using usual routines of image processing), compared to photos, cross checked with field evidences. This has allowed to point out SPOT5 potential: the classification is very similar to the Natura 2000 check list and shows a good ability to map this type of shore. This preliminary test is a begining to a wider program of coastal monitoring by SPOT5.

Mots clés: Benthic habitats; Chausey archipelago; Littoral; SPOT5

Domaines: Ecosystèmes

Adeline Cotonnec, Jérôme Fournier, Pascal Gouéry, Mouna Mokrani, Brice Anselme, et al.. First assessment of SPOT5 ability to map coastal benthic habitats: application to the Chausey Islands, English Channel.. Norois, 2005, 196, pp.37-50. ⟨hal-00101656⟩