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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-norwegian_mapping_authority/collection.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-norwegian_mapping_authority/collection.json
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In the case of modern data collected using multibeam echo sounders, the resolution will vary between 1m x 1m grids close to the coast for more recent surveys, or, as point data, with even higher resolution. Modern surveys that are slightly older, or were carried out in deeper waters, will frequently have a slightly lower resolution, typically from 3m x 3m to 10m x 10m. For older data collected using equipment such as single beam echo sounders, hand lead or machine lead, the resolution will typically be 20-50m between each recorded depth point in shallow, coastal areas. The resolution is even lower in the middle of fjords.
Havområder Norway Digital Mareano Modellbaserte vegprosjekter Felles datakatalog Kyst og fiskeri Norway's inner coastal waters Svalbard's inner coastal waters Barents Sea Norwegian Sea North Sea Skagerrak sea soundings survey data original hydrographic chart banks, shoals, shallows underwater rocks coast MAREANO Norwegian Mapping Authority, Hydrographic Service oceans
Hydrographic survey data is the most detailed depth data that the Norwegian Mapping Authority, Hydrographic Service has. This data has been collected by mapping the seabed in Norwegian coastal and sea areas.

Detailed depth data for large areas of the coast has been gathered using multibeam echo sounders. Only older surveys with less detailed resolution are available for other areas. Older data is being replaced regularly as new data is collected.

Hydrographic survey data includes several types of depth information.  The main products are point data with position and depth (.xyz), in addition to log data (.all).  For more recent surveys, log data containing backscatter information and water column data (.wcd) is also available.
Hydrographic survey data