Control points

Earlier, the method used for determining horizontal control points was triangulation but now satellite surveying is used. The elevation control points have been determined by levelling. The dataset Control points contains points with different levels of accuracy; the information about the accuracy class is included in the control point information.

National Land Survey of Finland customerservice@nls.fi

The product belongs to the open data of the National Land Survey of Finland. Open data license http://www.maanmittauslaitos.fi/en/maps-and-spatial-data/expert-users/en-maastotiedot-ja-niiden-hankinta/open-data-cc-40-licence.

More information: Topographic data and how to acquire it http://www.maanmittauslaitos.fi/en/maps-and-spatial-data/expert-users/topographic-data-and-how-acquire-it.

The product is available as nationwide or by various search criteria, e.g. by choosing a particular area, according to the category or quality of the control point, according to the time of the measurement etc. A separate benchmark report card with descriptions is also available. The benchmark report card contains all information about the benchmark. You can also acquire the data as a text file. Coordinate information in text format include the number, coordinates and elevation of the control point. The illustration shows the location of the control point in the terrain. A printed index map shows all horizontal and elevation control points of a desired area.

The dataset Control points is available also via the property information service Kiinteistötietopalvelu (in Finnish): http://www.maanmittauslaitos.fi/aineistot-palvelut/verkkopalvelut/kiinteistotietopalvelu.

Copyright and other immaterial rights on the dataset Control points are owned by the agencies that have made the measurements. The data material is not confidential. Public access to the material is not restricted by the INSPIRE Directive.