Topographic DEM - Littoral pebble spit - Baie de Somme

DATA :Topographic DEMs obtained from a LIDAR system or a terrestrial laser scanner (TLS).(1) LIDAR data :Topographic DEM with a 1-m resolution and accuracy below 10 cm RMS in altimetry acquired by an airborne scanner (Leica ALS60).(2) TLS data :Topographic DEMs with a 10-cm resolution and an accuracy comprised between the mm and some cm (depending on the survey conditions). The DEM is derived from a point cloud obtained with a terrestrial laser scanner (Leica ScanStation C10).AREA : Portion of the littoral pebble spit of the Baie de Somme, in the sector of La Mollière (Cayeux-sur-Mer), including the upper part of the sandy intertidal zone and the active barrier spit, over 200 m in the cross-shore direction and 1200 m in the longshore direction.