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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.
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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.
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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.
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Image numérique scannée non géoréférencée de la Bathymétrie 1981_20_02 Date de création : 1981 Support de l'original: Dimensions : 1155mm x 765mm
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Image numérique scannée non géoréférencée de la Topographie 1993_24_17 Date de création : 1991 Support de l'original: Film polyester Dimensions : 1100mm x 751mm Description : P 93_10_2-17, rapport descriptif n° 680 EPSHOM/CH/GG/NP du 09/06/93
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Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_10 Date de création : 1986 Support de l'original: Dimensions : 850mm x 1255mm
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Image numérique scannée non géoréférencée de la Planicomp 1999_13_03 Date de création : 1999 Support de l'original: Film polyester Dimensions : 1097mm x 850mm Description : P 99_10_1-3, rapport descriptif n° 249 EPSHOM/CH/GG/NP du 26/04/1999
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Image numérique scannée non géoréférencée de la Topographie 017_2_09 Date de création : 1897 Support de l'original: Dimensions : 1120mm x 758mm
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Image numérique scannée non géoréférencée de la Bathymétrie Recherche et natures de fond 2004_08_09 Date de création : 2002 Support de l'original: Film polyester Dimensions : 1250mm x 807mm Description : RN 10-4, rapport particulier n° 283 MHA/NP du 08/12/2003.
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Image numérique scannée non géoréférencée de la Ecriture de sondes 035_C_0430 Date de création : 1950 Support de l'original: Dimensions : 850mm x 1074mm