The product "Distribution of the submarine dunes of the French continental shelf" contains digital vector data provided as 2D linear objects representing the crest of submarine dunes digitized from bathymetric surveys conducted by the Shom. When several surveys have been carried out on the same area or dune, the product contains the information from all the surveys. However, the data displayed on data.shom.fr is limited to the information from the most recent survey.

This product includes a map of the peaks of around 3,000 submarine dunes entered using bathymetric surveys by Shom. Each dune is marked out by a line showing its peak summit. Dune locations are precise to between 1 m (MBES data from the 2000-2010 period) and a dozen metres (data acquired prior to 2000 using a side sonar). The precision of the carrier location, the acquisition system and the MBES resolution (the distance between the systems acquired) also affect map precision. Submarine dunes can move at the rate of a few metres per year, but can also exceed 30 m/year. The precision of dune positions will therefore decrease with the age of the measurement.

The product "Distribution of the submarine dunes of the French continental shelf" contains digital vector data provided as 2D linear objects representing the crest of submarine dunes digitized from bathymetric surveys conducted by the Shom. When several surveys have been carried out on the same area or dune, the product contains the information from all the surveys. However, the data displayed on data.shom.fr is limited to the information from the most recent survey.

Image numérique scannée non géoréférencée de la Bathymétrie Recherche 1986_15_09 Date de création : 1986 Support de l'original: Dimensions : 1160mm x 850mm

Image numérique scannée non géoréférencée de la 3285 Date d'édition : 1909 Date de publication : 1874 Date de révision : 1913 Support de l'original: papier Dimensions : 430mm x 277mm Description : Levé en 1869 par M. E. Mouchez, capitaine de vaisseau, commandant le Travailleur, assisté de M.M. Turquet, Charnoz, Boistel, Vincent, Bonnaffé et Sellier, officiers de ce bâtiment.

Image numérique scannée non géoréférencée de la Ecritures de sondes 013_2_287 Date de création : 1904 Support de l'original: Dimensions : 600mm x 789mm

Image numérique scannée non géoréférencée de la Bathymétrie 1991_29_04 Date de création : 1986-1989 Support de l'original: Film polyester Dimensions : 1102mm x 754mm Description : B 10-18, rapport particulier n° 123 MHA/NP du 29/03/1990.

Image numérique scannée non géoréférencée de la Bathymétrie Recherche 1981_20_17 Date de création : 1981 Support de l'original: Dimensions : 1160mm x 753mm

Image numérique scannée non géoréférencée de la Bathymétrie Recherches et nature de fond 1996_08_04 Date de création : 1994-1995 Support de l'original: Film polyester Dimensions : 1047mm x 740mm Description : RN 10-64, rapport particulier n° 326 MOP/NOU/NP du 07/11/1995.

Image numérique scannée non géoréférencée de la Bathymétrie 1986_29_014 Date de création : 1986 Support de l'original: Dimensions : 850mm x 1117mm