The DTM is a compilation of multibeam echosounder surveys acquired in 2013. The resolution is 1/64 arc-minutes (~30m). Surveys are located on the Capbreton Submarine Canyon (France) with depths from -4.7m to -344.9m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. The surveys which compose the DTM are S201306500-09 and S201306500-11. Data and metadata associated to these surveys are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The regional bathymetric Atlantic – Channel – North-Sea DTM has a resolution of 0.001° (~111m). Its geographic coverage includes the Bay of Biscay, the English Channel and a part of the North Sea. The DTM extends from the coast to the continental slope (about of 4800m deep). This DTM is produced in the framework of the HOMONIM project which aims at improving operational forecast capabilities for the national coastal flood warning system. This DTM is offered openly on the Shom diffusion website (http://diffusion.shom.fr/produits/bathymetrie/mnt-facade-atl-homonim.html). http://dx.doi.org/10.17183/MNT_ATL100m_HOMONIM_WGS84

The DTM is a compilation of multibeam echosounder surveys acquired between 2012 and 2015. The resolution is 1/128 arc-minutes (~15m). Surveys are located between La Hague and Carteret (France) with depths from 5.6m to -93.9m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. The surveys which compose the DTM are S201206100-1, S201206100-2, S201304800-1, S201304900-01, S201304900-02, S201304900-03, S201304900-04, S201304900-05, S201304900-06, S201304900-07, S201304900-08, S201304900-09, S201304900-10, S201304900-11, S201400800-1, S201400800-2, S201502700-1, S201502700-2 and S201502700-3. Data and metadata associated to these surveys are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The DTM is a compilation of multibeam echosounder surveys acquired between 2005 and 2013. The resolution is 1/64 arc-minutes (~30m). Surveys are located near the Côtes d’Armor coasts (France) with depths from -1.4m to -70.6m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. The surveys which compose the DTM are S200601400-1, S200607200-1, S200608000-1, S200701700-1, S200701700-2, S200701700-3, S200704400-1, S200800800-1, S200902800-1, S200907000-1, S201010500-1, S201202400-1, S201209200-1, S201209200-2, S201209200-3, S201209200-4, S201306700-1, and S201306700-2. Data and metadata associated to these surveys are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The DTM is produced from the S201306500-02 multibeam echosounder survey, acquired in 2012. The resolution is 1/64 arc-minutes (~30m). It is located off the Brittany coasts (France) with depths from -92.2m to -122m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. Data and metadata associated to the survey are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The DTM is produced from the S201504900-1 multibeam echosounder survey, acquired in 2015. The resolution is 1/128 arc-minutes (~15m). It is located close to Ouessant (France) with depths from -44.2m to -100.2m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. Data and metadata associated to the survey are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The DTM is produced from the S201502800-1 multibeam echosounder survey, acquired in 2015. The resolution is 1/1024 arc-minutes (~4m). It is located in front of Dunkirk (France) with depths from -16.4m to -43.3m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. Data and metadata associated to the survey are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The DTM is produced from the S201202300-1 multibeam echosounder survey, acquired in 2012. The resolution is 1/256 arc-minutes (~8m). It is located in front of Dunkirk (France) with depths from -13.9m to -40.6m. Depths are referenced to the Lowest Astronomical Tide and the coordinates are expressed into the WGS84 reference frame. Data and metadata associated to the survey are available on the website http://diffusion.shom.fr/pro/lots-bathy.html. The DTM is not to be used for navigation.

The product contains a description of submarine cables and pipelines brought to the attention of Shom on French areas of responsibility. These are 2D linear objects of the seabed that divide into two categories: • The submarine cables: these are cables placed on the seabed where electricity or information (telecommunication) flows. They represent the vast majority of objects (more than 90%); • Emissaries and submarine pipes: these are pipes that allow the discharge, sampling or circulation of fluids.

Non-georeferenced digital images in JPEG2000 format from former hydrographical survey fair sheets obtained from Shom's historical archives.