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 Traster 1996_18_01 Date de création : 1996 Support de l'original: Film polyester Dimensions : 1038mm x 735mm Description : P 96_10_4-1, rapport descriptif n° 575 EPSHOM/CH/GG/NP du 21/05/1995.

Image numérique scannée non géoréférencée de la Bathymétrie et sonal 1996_40_01 Date de création : 1996 Support de l'original: Film polyester Dimensions : 1044mm x 742mm Description : BS 10-1, rapport particulier n° 129 MOP/NOU/NP du 19/04/1996.

Image numérique scannée non géoréférencée de la Bathymétrie Recherches 1996_53_02 Date de création : 1995 Support de l'original: Film polyester Dimensions : 1050mm x 750mm Description : R 10, rapport particulier n° 156 MHA/NP du 12/07/1996;

Image numérique scannée non géoréférencée de la Traster 1993_30_087 Date de création : 1989-1991 Support de l'original: Film polyester Dimensions : 1100mm x 753mm Description : P 89_10_5-31, rapport descriptif n° 239 EPSHOM/E/GG/NP du 17/04/89, rapport particulier n° 041 MOP/NOU/NP du 18/02/93.

Image numérique scannée non géoréférencée de la Bathymétrie Recherche 1998_17_02 Date de création : 1997 Support de l'original: Film polyester Dimensions : 1092mm x 860mm Description : R 10-2, rapport particulier n° 35 MHA/NP du 23/01/1998, complète minute B10-2 (1996_60_02)

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 Planicomp 1995_01_07 Date de création : 1994 Support de l'original: Calque Dimensions : 785mm x 1126mm Description : P 95_10_1-7, rapport descriptif n° 154 EPSHOM/CH/GG/NP du 31/01/1995.