All tasks undertaken by the Norwegian Mapping Authority involve geographical or ratified information, whether in regard to data on which a map is based, the name of a town, property boundaries or property rights issues.

The Norwegian Hydrographic Service was established in 1932 and has operated as a division of the Norwegian Mapping Authority since 1986. The division has 120 employees and is based in Stavanger.

Contact the Norwegian Hydrographic Service

+47 32 11 80 00
Visiting address: Professor Olav Hanssens vei 10, 4021 Stavanger
Postal address: The Norwegian Hydrographic Service, Post box 60, N-4001 Stavanger, Norway
Billing address: Kartverket sjødivisjonen, Postboks 600 Sentrum, N-3507 Hønefoss. (EHF: 9908:971040238)
Org. No.:  NO 9710 40238

Official nautical charts

The Norwegian Hydrographic Service is the only authorised producer of official nautical charts and electronic navigational charts (ENC) in Norway, and vessels over a certain size are obliged to use these charts. As well as cartographical work, the Hydrographic Service is also responsible for information about tidal waters and currents.

Safe navigation

The Norwegian Hydrographic Service is required to facilitate safe and effective navigation in Norwegian coastal and marine areas. The Hydrographic Service undertakes this task by gathering, administering, processing and publishing official maritime information to a range of user groups.

Charting the ecosystem

While safe coastal navigation takes top priority, the Hydrographic Service’s deep water database is also useful for other purposes, including coastal zone planning and administration of fisheries.

As a supplier of bathymetric data, the Norwegian Mapping Authority helps to improve knowledge of the structure, mode of operation and status of the marine ecosystem. This knowledge provides a framework for establishing sustainable management of coastal and marine areas in Norway.


Primar is an international collaboration dedicated to providing a consistent and reliable electronic navigational chart (ENC) service, and is operated on a non-profit basis by the Norwegian Hydrographic Service.

VISITING ADDRESS: Professor Olav Hanssens vei 10, 4021 Stavanger is the Norwegian Hydrographic Service's visiting address.