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Hydrographic data

Bathymetric data - Open depth data

Hydrographic surveys produce depth data for nautical chart production and other purposes.

Bathymetric data consists of depth points obtained from full-coverage surveys or soundings along a predetermined line. Bathymetric data is primarily used for the production of nautical charts, fairway planning and maintenance. In data produced with full-coverage depth measurement methods (echo sweeping and multibeam surveys), the point density is < 2m. When using other measurement methods (for example sounding along a predetermined line), the point density is 10–40 metres.

Data is available on sea areas and the Vuoksi, Kymi and Päijänne watercourses. There is more detailed depth material in merchant shipping lanes and in small craft tracks. In other areas, the availability varies.

Enquiries related to hydrographic data: copyright (at) traficom.fi

The Territorial Surveillance Act (External link) limits the systematic measurement of the topography of the sea bottom in Finnish waters.

Official bathymetric data for Finland’s sea area (including regional waters) is available for viewing and download via the Baltic Sea Hydrographic Commission’s (BSHC) Bathymetry Database: http://data.bshc.pro/ (External link)

Bathymetric data from Finland’s exclusive economic zone and inland waterways will be published as gridded data via an interface that complies with the Web Coverage Service (WCS) standard as soon as the necessary technical solutions are available.

Previously available depth point data

If you would like to access the dense Ascii XYZ zip files that were previously available through the Finnish Transport Agency (now the Finnish Transport Infrastructure Agency) before the WCS interface is completed, please contact copyright@traficom.fi

For more information regarding the scope of this data, see the index map

Depth point data licence

The above-mentioned depth point data is licensed under the Creative Commons 4.0 By (External link) licence.

The Creative Commons 4.0 By (External link) licence requires that you attribute the work in the manner specified by the author of the data.

Traficom requires that the source of depth data is attributed as follows:

 “Source: The Finnish Transport and Communications Agency (Traficom). Not for navigational purposes. Does not meet the requirements set for official nautical charts.”

Navigational purposes refer to all maritime operations, including route planning, positioning, determining the best course and ensuring the vessel's safe passage.

Avoimet syvyysaineistot

Nautical charts

Hydrographic data
Hydrographic data is compiled from a number of sources, the most important of which are bathymetric data, the fairway register, and the National Land Survey of Finland’s Topographic Database. The data is generalised into a range of scale levels for the corresponding nautical chart products. The object classes for which Traficom is responsible are available via the Download and Viewing Service on the terms of the Hydrographic Data Licence or the CC BY 4.4 licence.

All hydrographic data belonging to the Finnish Transport and Communications Agency (Traficom) is protected under the Copyright Act. Access to the data for anything other than navigational purposes is enabled with an open data licence or the Hydrographic Data Licence (certain exceptions apply).

Traficom's hydrographic data is primarily accessible via Traficom’s Download and Viewing Service (External link). Most of the material can be downloaded via the service, free of charge, with an open data licence (see “Use of and licences for data”) with the exception of certain listed hydrographic data, which can also be downloaded free of charge for purposes other than navigational use when the conditions of the Hydrographic Data Licence (see “Use of and licences for data”, “Hydrographic Data Licence of the Finnish Transport and Communications Agency Traficom”) are met.

The navigational purpose shall be based on an agreement procedure. Enquiries regarding the procedure should be sent by e-mail to copyright (at) traficom.fi

or via this form: PDF -hakemus/lupa  (pdf, 314.34 KB)

Navigational purposes refer to all maritime operations, including route planning, positioning, determining the best course and ensuring the vessel's safe passage.

Description of the content of the hydrographic data

Coming soon. Enquiries: copyright(at)traficom.fi