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.

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.

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Image numérique scannée non géoréférencée de la Traster Topo Bathy 1985_37_07 Date de création : 1985 Support de l'original: Dimensions : 800mm x 1116mm

Image numérique scannée non géoréférencée de la Bathymétrie 2003_52_03 Date de création : 2001 Support de l'original: Film polyester Dimensions : 1250mm x 798mm Description : SMFN 10-30 rapport particulier n° 174 MHA/NP du 03/07/2002.

Image numérique scannée non géoréférencée de la Bathymétrie Recherches et nature de fond 2010_049_09 Date de création : 2009 Support de l'original: Film polyester Dimensions : 1200mm x 878mm Description : RN 10-2, rapport particulier RAP2010-123.

Image numérique scannée non géoréférencée de la Traster 1993_21_23 Date de création : 1991 Support de l'original: Film polyester Dimensions : 753mm x 1100mm Description : P 91_10_8-15b, rapport particulier n° 296 MHA/NP du 24/10/91, rapport descriptif n° 909 EPSHOM/HY/GG/NP du 24/10/91.

Image numérique scannée non géoréférencée de la Bathymétrie 1997_14_03 Date de création : 1993-1996 Support de l'original: Film polyester Dimensions : 1053mm x 754mm Description : B 10-3, rapport particulier n° 177 MHA/NP du 27/08/1996.

Image numérique scannée non géoréférencée de la Bathymétrie 1980_03_08 Date de création : 1980 Support de l'original: Dimensions : 1044mm x 758mm