Depth data for lakes and rivers

Inland water depth data (lakes, rivers) is mainly based on depth surveys conducted by the environmental administration. Depth curves and areas as well as the lake's maximum depth point data are derived from the data. Physiography data from the lake register maintained by Syke have been combined with lake probe points, maximum depth points and depth ranges. These depth curves are delivered to the National Land Survey of Finland, where they are stored as part of the terrain database and further published from terrain maps. The data is included in SYKE's open data (CC BY 4.0). An INSPIRE data product has been published from the data. Further information: https://geoportal.ympäristö.fi/meta/julkinen/dokumentit/Syvyys.pdf The Lake and River Depth Profiles dataset includes information on depth profiles of lakes and rivers and is primarily based on the depth measurements done by the national environmental administration. The bathymetric lines and the depth areas are produced from separate measurement point information. Bathymetric information and the maximum depth points have also information on physiography from the lake database “Järvirekisteri” maintained by Syke. These bathymetric lines are delivered for The National Land Survey of Finland where they are combined with the base map dataset (Maastodatabase) and published as maps.