Grain size composition of the seabed sediments in the Norwegian coastal areas. Detailed interpretation based on large scale mapping and high resolution field data.

The map service shows levels of heavy metals and other inorganic environmental indicators in surface sediments, as well as content of mud and TOC, which are important factors for binding and accumulation of heavy metals in the sediments. The term heavy metals includes all metallic elements that have a relatively high specific gravity. Heavy metals are natural constituents of the earth's crust and occur in varying concentrations in most natural materials. In addition, the content of microplastic particles in sediments is shown as one of the important environmental indicators.

Anchoring and mooring conditions, as interpreted from bottom type (hard or soft bottom) and depth.

The map service features land forms on the sea floor. Land forms formed under the influence of ice, pockmarks formed by seepage of gas or liquid from the underlying sediments/bedrock and slide scarps formed by slope failures, which are available from the map service, are interpreted on the basis of detailed bathymetry and sediment data. In addition, the service include depth information with depth contours, shaded relief in gray scale and shaded bathymetry in blue scale (terrain) from the detailed mapped areas in the coastal zone.