Cadastral index map

Property boundaries are marked with boundary markers in the terrain when forming a property. Boundary markers indicate the boundary lines of a property. A boundary can also be a natural terrain formation, such as a shore, drainage ditch or road. In sparsely populated areas, boundary markers have been defined with an accuracy of approx. 20 cm by GPS measurement since 2005. Coordinates of earlier boundary markers have been defined either by image measurement from aerial photographs or by digitalisation from maps. The accuracy of these boundary markers varies in general between 50 cm and 4 m, over 4 m in some cases. The accuracy of a boundary marker is indicated by its RSK value.

In population centres, the Cadastral index map is mainly based on the municipality's large scale base map material in the plans, the property data of which has been updated.

There can be inaccuracies in the location data of the Cadastral index map, because there are no exact coordinates for all boundary markers. The area of a register unit is shown in more detail in the cadastral survey documents (available in the archives of the keeper of the cadastral registry) and the terrain than on the Cadastral index map.

More information, report on positional accuracy of boundary markers in the Cadastral index map (in Finnish) http://www.maanmittauslaitos.fi/sites/maanmittauslaitos.fi/files/old/Nro_112_Kiinteistorekisterikartan_rajamerkkien_sijaintitarkkuus.pdf

National Land Survey of Finland customerservice@nls.fi

no limitations to public access