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.

Image numérique scannée non géoréférencée de la Recherches 1994_29_15 Date de création : 1993 Support de l'original: Film polyester Dimensions : 753mm x 1100mm Description : R 10-6, rapport particulier n° 109 MHA/NP du 14/04/94, lettre n° 460 EPSHOM/CH/GG/NP du 05/11/03

Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_13 Date de création : 1986 Support de l'original: Dimensions : 900mm x 659mm

Image numérique scannée non géoréférencée de la Topographie 1972_06_04 Date de création : 1972 Support de l'original: Dimensions : 790mm x 1149mm

Image numérique scannée non géoréférencée de la Bathymétrie 1977_10_02 Date de création : 1977 Support de l'original: Dimensions : 767mm x 1160mm

Image numérique scannée non géoréférencée de la Contre calque de la minute 70_18_01 corrigée 1984_08_01 Date de création : 1984 Support de l'original: Dimensions : 1200mm x 762mm

Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_12 Date de création : 1986 Support de l'original: Dimensions : 1254mm x 900mm

Image numérique scannée non géoréférencée de la Bathymétrie 1980_03_14 Date de création : 1980 Support de l'original: Dimensions : 1045mm x 758mm