Depth data consists of depth points obtained from full-coverage surveys or soundings along a predetermined line.
Hydrographic surveys are used to produce depth information for purposes such as nautical chart production, channel design and maintenance, and planning and implementation of water construction projects. Depth measurement data is in the form of point cloud depth information.
Data inquiries
Depth data such as depth contours, depth areas, and depth points can be downloaded via Traficom's download and viewing service. The data is also available through an interface service.
Depth model products are available from the Exclusive Economic Zone of the sea area and from the Vuoksi and Kymijoki water systems without a permit process. It is also possible to obtain depth data from other Finnish sea areas through a permit process. The coverage and reliability of the depth data vary depending on the time and location of the survey.
Pricing for data deliveries is based on the number of work hours used. The hourly rate is €200/hour + VAT (minimum charge 1 hour).
The Territorial Surveillance Act restricts the systematic measurement and recording of seabed shapes within Finnish territorial waters. According to the Act on the Openness of Government Activities, hydrographic survey data may be classified as confidential. If the data receives a security classification, it sets conditions for data release. Therefore, not all data requests can be fulfilled.
Submitting a data inquiry
For data inquiries please contact: syvyysmittausaineistot(at)traficom.fi
Or fill out the form below (available in Finnish and Swedish).
Product description of depth measurement data
Depth measurement data is delivered in raster format as a GeoTIFF file. It is a depth model product where the cell values represent the depth from measurement observations within each cell area. The product is continuously updated, and its coverage expands with new hydrographic surveys. The depth model may consist of surveys conducted at different times and with different methods.
| Coordinate system and vertical datum | ETRS-TM35FIN (EPSG:3067) N2000 height system (EPSG:3900), which corresponds to BSCD2000 (EPSG:10678) as the reference level for depths in Finnish marine areas. |
| Resolutuon | 1 m |
| Cell values | shallowest depth, average depth, deepest depth |
Terms of use
The public depth measurement data is licensed under Creative Commons 4.0 (External link)The source of the data must be attributed as required by the license.
Traficom requires the following attribution format when using the data:
"Source: Finnish Transport and Communications Agency. Not for navigational use. Does not meet the requirements of an official nautical chart."
Usage terms for confidential data are defined in the data release agreement.
