Summary map of coastal benthic habitats of the Natura 2000 sites of the Rade de Brest (FR5300046), Alder estuary and the Elorn River site (FR5300024)

The synthesis map of the benthic habitats of the Natura site of the Rade de Brest, is the result of integration and treatment of several data sources. It results from the interpretation of both acoustic (multibeam sounder, side-scan sonar, RoxAnn) and optical (ortholitoral 2000 and Lidar) images, underwater videos, bio-sedimentary sampling and direct in situ observations (GPS surveys, photographs, etc.) made between 2007 and 2018.