Which information layers?

Users have access to the following geographical information system layers:

Mean depth full coverage with water depth to LAT reference from EMODnet DTM in gridded form over whole of maritime basin on a grid of 1/16 * 1/16 arc minutes (ca 115 meter grid) complemented by land DTM in traditional atlas style colours

Mean depth in multi colour style with water depth to LAT reference from EMODnet DTM in gridded form over whole of maritime basin on a grid of 1/16 * 1/16 arc minutes (ca 115 meter grid) but no land

Mean depth in rainbow colour style with water depth to LAT reference from EMODnet DTM in gridded form over whole of maritime basin on a grid of 1/16 * 1/16 arc minutes (ca 115 meter grid) but no land

Source references is a layer which allows to identify the prevailing data sources used for each DTM grid cell. Activating the identification function in the sources layer will reveal for each DTM cell which survey data set or composite DTM was used with a link to their metadata from the CDI Data Discovery and Access service or Sextant Catalogue service. Grey areas are derived from GEBCO.

Survey tracks/polygons is another layer to view the locations and retrieve (CDI) metadata of the so far collated bathymetric survey data sets. Users can define a lat - lon box that will jump to the CDI Data Discovery and Access service for retrieving CDI metadata for the survey data sets within that geographical search window. This will then facilitate the users to refine their query and to request access to the high resolution survey data sets themselves by means of a shopping mechanism.

Land geography and topography as derived from OpenStreetMap

Coastline as derived from OpenStreetMap 2014 WMS. It is a highly detailed coastline.

High resolution bathymetry for selected coastal regions: this layer has been added in September 2015 to test the concept of a multi resolution product. High resolution data is available for the German North Sea coast, the French Mediterranean coast and Dunmanus bay in Ireland. Activating the layer will highlight these areas and the user is facilitated to zoom in further than in the overall bathymetry layers.

Underwater features which is provided by GEBCO as GEBCO Undersea Features WMS. The GEBCO Sub-Committee on Undersea Features (SCUFN) maintains and provides a gazetteer of the names, generic feature type and geographic positions of features on the seafloor. The level of detail is dependent on the viewing scale.

Wrecks which is provided by partner OceanWise as proprietary WMS service and uses the UKHO Wrecks database as source. This Wrecks layer covers all European seas and the level of detail is dependent on the viewing scale.

Geographic grid

GEBCO bathymetry basemap giving a back drop map with General Bathymetric Chart of the Oceans and Blue Marble satellite land cover at circa 1.000 m grid resolution

All these layers are made available in the Bathymetry Viewing and Download service and for many layers additional functionalities are offered such as depth profiles along user drawn transects, 3D viewing of the batyhymetry in the browser, retrieving metadata of surveys, and downloading of DTM tiles and other data products. 

The portal also provides a CDI Data Discovery and Access service to identify and request access to bathymetric survey data that are acquired and managed by distributed data providers. A selection of these data sets are used for the EMODnet Digital Terrain Model (DTM). Moreover the portal provides a Sextant Catalogue service to describe and identify composite DTMs that were contributed by data providers instead of bathymetric survey data as input for the EMODnet DTM.