The coastal topo-bathymetric product of the "Morbihan" zone at a resolution of 0.0002° (~20 m) was produced as part of the TANDEM project (Programme Investissements d'Avenir, ANR-11-RSNR-00023-01). It covers a sector encompassing mainly the department of Morbihan and part of that of Loire-Atlantique. This DTM extends from the peninsula of Gâvres in the northwest to La Baule in the southeast, it includes the Gulf of Morbihan, the bay and the peninsula of Quiberon, the islands of Houat, Hoëdic and Belle-Ile, the Vilaine estuary… This DEM is intended to be implemented in the hydrodynamic models of the TANDEM project in order to estimate the coastal effects of tsunamis for the Atlantic and the English Channel, where the French nuclear power plants are installed for about 30 years. This product is available with the lowest astronomical tide level (PBMA) or the mean sea level (NM) as a vertical reference.
