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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 Ecriture de sondes 035_C_0429 Date de création : 1950 Support de l'original: Dimensions : 1150mm x 764mm

  • Image numérique scannée non géoréférencée de la Topographie Roches 1970_16_07 Date de création : 1970 Support de l'original: Dimensions : 772mm x 1068mm

  • Image numérique scannée non géoréférencée de la Bathymétrie 2002_38_03 Date de création : 2001 Support de l'original: Film polyester Dimensions : 1250mm x 866mm Description : SMF 10-21, rapport particulier n° 128 MHA/NP du 24/05/2002,

  • Image numérique scannée non géoréférencée de la Bathymétrie 1977_10_22 Date de création : 1977 Support de l'original: Dimensions : 758mm x 1170mm

  • Image numérique scannée non géoréférencée de la Bathymétrie 1981_20_01 Date de création : 1981 Support de l'original: Dimensions : 1160mm x 754mm

  • Image numérique scannée non géoréférencée de la Dessin topo 006_09_07_1 Date de création : 1936 Support de l'original: Dimensions : 1052mm x 761mm

  • Image numérique scannée non géoréférencée de la Bathymétrie topographie et nature de fond 2003_38_09 Date de création : 2001-2002 Support de l'original: Film polyester Dimensions : 1250mm x 843mm Description : BTN 10-9, rapport particulier n° 107 MHA/NP du 07/06/2002.