EMODnet Digital Bathymetry (DTM)

Date(s) (Publication)
Author(s):
Originator(s): Baltic Sea Hydrographic Commission, British Oceanographic Data Centre, Bulgarian National Oceanographic Data Centre(BGODC), Institute of Oceanology, Dokuz Eylul University, Institute of Marine Science and Technology, Federal Maritime and Hydrographic Agency, Flemish Ministry of Mobility and Public Works; Agency for Maritime and Coastal Services; Coastal Division, Geological Survey of Ireland, GGS Geo Consultancy, UNEP/GRID-Arendal, Hellenic Centre for Marine Research, Institute of Oceanography (HCMR/IO), Hydrographic Institute of the Navy, IEO/Spanish Oceanographic Institute, IFREMER / IDM/SISMER, IHPT, Hydrographic Institute, Institute of Marine Science (ISMAR) - Bologna, Institute of Marine Research (IIM-CSIC), International Ocean Institute - Malta Operational Centre (University Of Malta) / Physical Oceanography Unit, Jardfeingi, the Faroe Islands Earth and Energy Directorate, Marine Information Service, Marum - Center for Marine Environmental Sciences, University of Bremen, National Institute of Marine Geology and Geoecology, National Institute of Engineering and Industrial Technology, Lisbon - Department of Industrial Impact Studies, National Oceanography Centre, Liverpool, NIOZ Royal Netherlands Institute for Sea Research, Norwegian Hydrographic Service, OceanWise Limited, OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Infrastructures Division, OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Oceanography, National Institute of Meteorology and Geophysics, Lisbon - Division of Marine Meteorology, Royal Danish Administration of Navigation & Hydrography, Oceanographic Department, Royal Netherlands Navy Command, Hydrographic Office, SC Marine Research SRL, SHOM (SERVICE HYDROGRAPHIQUE ET OCEANOGRAPHIQUE DE LA MARINE), AZTI - Tecnalia, Headquarters Pasaia(Gipuzkoa), Directorate General of Fisheries Management - General Secretariate of the Sea, Geological Survey of Israel, Marine Technology Unit. Mediterranean Marine and Environmental Research Centre, Task Group for the Extension of the Continental Shelf, The Norwegian Petroleum Directorate (NPD)
Point of contact(s): Marine Information Service
Publisher(s): Marine Information Service
Credit EMODnet Bathymetry
DOI 10.12770/c7b53704-999d-4721-b1a3-04ec60c87238
Abstract The "EMODnet Digital Bathymetry (DTM)" is a multilayer bathymetric product for Europe’s sea basins covering::
• the Greater North Sea, including the Kattegat and stretches of water such as Fair Isle, Cromarty, Forth, Forties, Dover, Wight, and Portland
• the English Channel and Celtic Seas
• Western and Central Mediterranean Sea and Ionian Sea
• Bay of Biscay, Iberian coast and North-East Atlantic
• Adriatic Sea
• Aegean - Levantine Sea (Eastern Mediterranean)
• Azores - Madeira EEZ
• Canary Islands
• Baltic Sea
• Black Sea
• Norwegian – Icelandic seas

The DTM is based upon more than 7700 bathymetric survey data sets and Composite DTMs that have been gathered from 27 data providers from 18 European countries and involving 169 data originators. The gathered survey data sets can be discovered and requested for access through the Common Data Index (CDI) data discovery and access service that also contains additional European survey data sets for global waters. The Composite DTMs can be discovered through the Sextant Catalogue service. Both discovery services make use of SeaDataNet standards and services and have been integrated in the EMODnet Bathymetry web portal (http://www.emodnet-bathymetry.eu). In addition, the Bathymetry Viewing and Download service of the EMODnet bathymetry portal gives users wide functionality for viewing and downloading the EMODnet digital bathymetry such as:
• water depth (refering to the Lowest Astronomical Tide Datum - LAT) in gridded form
on a DTM grid of 1/8 * 1/8 arc minute of longitude and latitude (ca 230 * 230 meters)
• option to view depth parameters of individual DTM cells and references to source data
• option to download DTM in 16 tiles in different formats: ESRI ASCII, XYZ, EMODnet CSV, NetCDF (CF), GeoTiff and SD
• layer with a number of high resolution DTMs for coastal regions
• layer with wrecks from the UKHO Wrecks database.
The NetCDF (CF) DTM files are fit for use in a special 3D Viewer software package which is based on the existing open source NASA World Wind JSK application. It has been developed in the frame of the EU FP7 Geo-Seas project (another sibling of SeaDataNet for marine geological and geophysical data) and is freely available. The 3D viewer also supports the ingestion of WMS overlay maps. The SD files can also be used for 3D viewing by means of the freely available iView4De(Fledermaus) software.

The original datasets themselves are not distributed but described in the metadata services, giving clear information about the background survey data used for the DTM, their access restrictions, originators and distributors and facilitating requests by users to originator.
Keywords Elevation, Gravity, magnetics and bathymetry, Administration and dimensions, Terrestrial, Bathymetry and Elevation, Metadata parameters, Reference numbers, EMODnet, seafloor depth, ocean depth, Digital Terrain Model, DTM, grid, bathymetric data, European seas, Azores, Madeira, Canary Islands, North-East Atlantic, Bay of Biscay, Celtic Seas, English Channel, North Sea, Norvegian Sea, Iceland Sea, Baltic Sea, Mediterranean Sea, Adriatic Sea, Aegean Sea, Black Sea, Seabed, Bathymetry
Lineage The DTM is a grid of 1/8 * 1/8 arc minute of longitude and latitude (ca 230 * 230 meters).

Each grid cell has the following information:

- x,y coordinates
- minimum waterdepth in meters to LAT
- average waterdepth in meters to LAT
- maximum waterdepth in meters to LAT
- standard deviation of waterdepth in meters
- number of values used for interpolation over the grid cell
- interpolation flag : 1 when extrapolated from the neighbouring cells
- average
Utilisation Restriction related to intellectual property rights.
Temporal Extent 1830-01-01 - 2016-08-31
Data