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  • 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 Traster Topo 1991_34_06 Date de création : 1991 Support de l'original: Film polyester Dimensions : 1082mm x 757mm Description : P 91_10_6-6 Rapport descriptif n° 679 EPSHOM/HY/GG/NP du 22/07/1991.

  • Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_07 Date de création : 1986 Support de l'original: Dimensions : 599mm x 850mm

  • Image numérique scannée non géoréférencée de la Bathymétrie 1993_59_03 Date de création : 1993 Support de l'original: Film polyester Dimensions : 765mm x 595mm Description : B 10, rapport particulier n° 189 MOP/NOU/NP du 09/08/93;

  • 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 Bathymétrie 2001_45_06 Date de création : 1996-1999 Support de l'original: Film polyester Dimensions : 1150mm x 755mm Description : B 10-14, rapport particulier n° 270 MOP/UHNC/NP du 01/09/1999. (Complète minute 91_56_08)

  • Image numérique scannée non géoréférencée de la Bathymétrie 2001_45_02 Date de création : 1996-1999 Support de l'original: Film polyester Dimensions : 1150mm x 753mm Description : B 10-5, rapport particulier n° 270 MOP/UHNC/NP du 01/09/1999. (Complète minute 88_18_05)

  • Image numérique scannée non géoréférencée de la Bathymétrie Recherche 1974_13_16 Date de création : 1974 Support de l'original: Dimensions : 1044mm x 762mm