N2000korkeusjärjestelmä

The N2000korkeusjärjestelmä, also known as the N2000 height system, is a national vertical datum used in Finland. It was established to provide a consistent and unified system for measuring and representing elevations across the country. Prior to its adoption, various older height systems and local datums were in use, leading to inconsistencies and difficulties in geodetic surveying, engineering projects, and spatial data management.

The N2000 system is based on a network of precise leveling points established by the National Land Survey of Finland (Maanmittauslaitos). These points, known as height benchmarks, are carefully surveyed and maintained to ensure the long-term stability and accuracy of the system. The reference surface for the N2000 system is tied to the mean sea level, specifically referencing observations made at tidal gauges along the Finnish coast.

The primary purpose of the N2000korkeusjärjestelmä is to facilitate accurate topographic mapping, infrastructure planning and construction, hydrological studies, and the management of national land resources. It ensures that all height information is comparable and interoperable, regardless of the specific project or location within Finland. The system is periodically re-evaluated and updated to account for any crustal movements or changes in the reference sea level.