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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 Recherche 2001_45_09 Date de création : 1996-1999 Support de l'original: Film polyester Dimensions : 1150mm x 752mm Description : R 10-7, rapport particulier n° 270 MOP/UHNC/NP du 01/09/1999. (Complète minute 88_18_07)
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Image numérique scannée non géoréférencée de la Bathymétrie 2000_48_10 Date de création : 1995-1998 Support de l'original: Film polyester Dimensions : 1150mm x 756mm Description : B 10-10, rapport particulier n° 52 MOP/UHNC/NP du 19/02/1999.
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Image numérique scannée non géoréférencée de la Planicomp 1995_31_01 Date de création : 1995 Support de l'original: Calque Dimensions : 820mm x 1123mm Description : P 95_10_7-1, rapport descriptif n° 799 EPSHOM/CH/GG/NP du 22/06/1995.
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Image numérique scannée non géoréférencée de la Traster 1995_16_03 Date de création : 1995 Support de l'original: Film polyester Dimensions : 1110mm x 751mm Description : P 95_10_4-3, rapport particulier n° 488 EPSHOM/CH/GG/NP du 11/04/1995.
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Image numérique scannée non géoréférencée de la 2011_031_02 Date de création : 2011 Support de l'original: Dimensions : 1300mm x 918mm
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Image numérique scannée non géoréférencée de la Bathymétrie et sonal 1996_40_03 Date de création : 1996 Support de l'original: Film polyester Dimensions : 1048mm x 752mm Description : BS 10-3, rapport particulier n° 129 MOP/NOU/NP du 19/04/1996.
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Image numérique scannée non géoréférencée de la Bathymétrie 1996_38_03 Date de création : 1994 Support de l'original: Film polyester Dimensions : 770mm x 593mm Description : B 10, rapport particulier n° 097 MOP/NOU/NP du 20/03/1996.