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.

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.

Image numérique scannée non géoréférencée de la Bathymétrie 2006_01_01 Date de création : 2005 Support de l'original: Film polyester Dimensions : 1300mm x 848mm Description : SMF 10-1, rapport particulier n° 002 MHA/NP du 05/01/2006.

Image numérique scannée non géoréférencée de la Bathymétrie 2001_20_02 Date de création : 1999 Support de l'original: Film polyester Dimensions : 1200mm x 769mm Description : SMF 10-22, rapport particulier n° 249 MHA/NP du 15/05/2000.

Image numérique scannée non géoréférencée de la Bathymétrie 2001_45_01 Date de création : 1996-1999 Support de l'original: Film polyester Dimensions : 1150mm x 752mm Description : B 10-2, rapport particulier n° 270 MOP/UHNC/NP du 01/09/1999. (Complète minute 88_18_02)

Image numérique scannée non géoréférencée de la Bathymétrie 2001_45_04 Date de création : 1996-1999 Support de l'original: Film polyester Dimensions : 1150mm x 758mm Description : B 10-8, rapport particulier n° 270 MOP/UHNC/NP du 01/09/1999. (Complète minute 88_18_08)

Image numérique scannée non géoréférencée de la Bathymétrie 2000_48_09 Date de création : 1995-1998 Support de l'original: Film polyester Dimensions : 1150mm x 752mm Description : B 10-9, rapport particulier n° 52 MOP/UHNC/NP du 19/02/1999.

Image numérique scannée non géoréférencée de la Bathymétrie 2000_48_01 Date de création : 1995-1998 Support de l'original: Film polyester Dimensions : 1150mm x 752mm Description : B 10-1, rapport particulier n° 52 MOP/UHNC/NP du 19/02/1999.

Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_04 Date de création : 1986 Support de l'original: Dimensions : 1123mm x 850mm