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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 1980_08_013 Date de création : 1979 Support de l'original: Dimensions : 1200mm x 755mm
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Image numérique scannée non géoréférencée de la Ecriture de sondes 010_4_197 Date de création : 1962 Support de l'original: Dimensions : 800mm x 639mm
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Image numérique scannée non géoréférencée de la Bathymétrie 1993_61_09 Date de création : 1993 Support de l'original: Film polyester Dimensions : 1100mm x 751mm Description : B 10-60, rapport particulier n° 242 MOP/NOU/NP du 08/10/93.
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Image numérique scannée non géoréférencée de la Bathymétrie Recherche 2002_48_13 Date de création : 2000-2001 Support de l'original: Film polyester Dimensions : 1280mm x 796mm Description : R 10-1, rapport particulier n° 133 MHA/NP du 30/05/2002,
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Image numérique scannée non géoréférencée de la 1988_29_13 Date de création : 1987 Support de l'original: Dimensions : 1150mm x 752mm
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Image numérique scannée non géoréférencée de la Roches 006_11_26 Date de création : 1889 Support de l'original: Dimensions : 716mm x 542mm
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Image numérique scannée non géoréférencée de la Sondes écrites 006_11_20 Date de création : 1889 Support de l'original: Dimensions : 548mm x 358mm
Catalogue Shom