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 Topo 1992_58_01 Date de création : 1992 Support de l'original: Film polyester Dimensions : 753mm x 1100mm Description : minute P 92_10_15-1

Image numérique scannée non géoréférencée de la Traster Topo 1992_58_02 Date de création : 1992 Support de l'original: Film polyester Dimensions : 752mm x 1100mm Description : minute P 92_10_15-2

Image numérique scannée non géoréférencée de la Bathymétrie Complémentaire 1997_14_23 Date de création : 1993-1996 Support de l'original: Film polyester Dimensions : 1049mm x 756mm Description : Bq 10-7, rapport particulier n° 177 MHA/NP du 27/08/1996.

Image numérique scannée non géoréférencée de la Bathymétrie 1997_14_19 Date de création : 1993-1996 Support de l'original: Film polyester Dimensions : 1056mm x 754mm Description : B 10-19, rapport particulier n° 177 MHA/NP du 27/08/1996.

Image numérique scannée non géoréférencée de la Bathymétrie 1996_38_05 Date de création : 1994 Support de l'original: Film polyester Dimensions : 770mm x 592mm Description : B 10, rapport particulier n° 097 MOP/NOU/NP du 20/03/1996.

Image numérique scannée non géoréférencée de la Topographie et sondes 010_5_02 Date de création : 1817 Support de l'original: Dimensions : 1057mm x 722mm

Image numérique scannée non géoréférencée de la 1980_08_012 Date de création : 1979 Support de l'original: Dimensions : 1200mm x 754mm