The NLS benchmark register contains information about nationwide control points and benchmarks. The marks are mainly horizontal and elevation benchmarks measured by the National Land Survey of Finland (NLS). In addition, the benchmark register contains horizontal and elevation benchmarks in class I measured by the Finnish Geodetic Institute. The benchmark register also includes some benchmarks measured by other agencies.
- Triangulation has previously been used for measuring horizontal control points and since the middle of 1980’s satellite surveying (GPS/GNSS measuring) is used.
- Levelling is used to determine the elevation benchmarks.
Coordinate and elevation systems
The coordinate systems of the benchmarks stored in the benchmark register are the national grid coordinate system (KKJ) and EUREF-FIN coordinate system (geographic coordinates and horizontal coordinates in the ETRS-TM35FIN coordinate system)
- height / elevation systems are N60 and N2000.
For more information, please contact us
Jyrki Puupponen puh. 040 190 9871
Matti Turunen puh. 040 779 3849
For more information about benchmarks, please contact the customer service of National Land Survey Offices throughout the country.
As regards benchmarks, report cards or coordinate data can be ordered. A benchmark report card includes all information about the benchmark. Coordinate data comprise the benchmark’s number, coordinates and height. In addition, a printout of the index map can be ordered portraying all horizontal or height benchmarks within the area.