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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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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 1999_03_03 Date de création : 1996-1997 Support de l'original: Film polyester Dimensions : 1069mm x 762mm Description : B 10-2, rapport particulier n° 73 MHA/NP du 27/02/1998.
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Image numérique scannée non géoréférencée de la Ecriture de sondes 036_J_1044 Date de création : 1961 Support de l'original: Dimensions : 1180mm x 763mm
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Image numérique scannée non géoréférencée de la Ecritures de sondes 003_1_55_06 Date de création : 1934 Support de l'original: Dimensions : 768mm x 1064mm
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Image numérique scannée non géoréférencée de la Construction sonal 1977_21_18 Date de création : 1977 Support de l'original: Dimensions : 774mm x 1088mm
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Image numérique scannée non géoréférencée de la Revue d'amers 1986_13_09 Date de création : 1986 Support de l'original: Dimensions : 850mm x 660mm
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Image numérique scannée non géoréférencée de la Constructions de routes 006_10_03 Date de création : 1833 Support de l'original: Dimensions : 1050mm x 1426mm
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Image numérique scannée non géoréférencée de la Topographie et sondes Définitive – Original du 3061 005_4_07_1 Date de création : 1869 Support de l'original: Dimensions : 1153mm x 748mm