Hydrograafisilla

Hydrograafisilla is a Finnish term that translates to "hydrographic" in English. It pertains to the branch of applied science that deals with the measurement and description of the physical features of the oceans, seas, and coastal areas, as well as the prediction of their change over time, for the primary purpose of safety of navigation and in general support of all marine activities, including economic development, security and defense, scientific research, and environmental protection.

The field of hydrography involves making measurements of depths, shorelines, the tides and currents, and the characteristics of the seabed and the overlying water. These measurements are crucial for creating nautical charts, which are essential navigational tools for mariners. Hydrographic data is also vital for a wide range of other applications, such as offshore construction, environmental monitoring, and the management of marine resources.

Hydrographic surveys are conducted using a variety of specialized equipment and techniques. Modern hydrography relies heavily on technologies like multibeam echosounders, side-scan sonar, GPS positioning systems, and airborne lidar. These technologies allow for the collection of highly accurate and detailed bathymetric data, which is the measurement of water depth.

The term "hydrograafisilla" can therefore be used in contexts related to surveys, charts, data, or the general practice of hydrography in Finland or by Finnish entities. It signifies the activities and information related to understanding and mapping the underwater world.