The new production system improves the timeliness, integrity and usability of the topographic database. In addition to the topographic database, the reform is reflected in maps and information services. The changes will become visible to users in stages over the next few years.
The topographic database of the National Land Survey of Finland is the only constantly updated geospatial dataset that covers the whole of Finland. All of the maps, electronic map services and interfaces of the National Land Survey of Finland are based on the topographic database, and the Finnish Defence Forces make extensive use of the materials in their operations, for example. The topographic database covers the road network, buildings, geographic names, land use, waterways and elevations in Finland, among other information.
– The renewal of the production system for topographic data is based on extensive modelling of topographic data performed together with the stakeholders to take the customers’ needs into account as far as possible. In practice, this means that the social impact of the topographic data produced by the National Land Survey of Finland will further increase, especially in analytical use, says Head of Development Risto Ilves.
The topographic database is updated in collaboration with several parties. The database is kept up to date with the help of aerial photos, scanning data and data produced by other providers. Municipalities and energy companies are among the most important partners. The accuracy of the classification of sites is also improved through topographic surveys.
Open source enables collaboration between businesses and the public administration
The new system utilises open source technologies, which enables comprehensive collaboration between businesses and the public administration.
– The renewal of the topographic data production system is part of a larger project in which we have extensively renewed our geospatial data production systems such as aerial photo, point cloud and control point registers using the same open source technology. The unified technological base enables more efficient maintenance and further development of the different systems in accordance with both our own needs and the needs of our customers, Ilves says.
The system was built using a modular architecture which allows for flexible development of technological solutions and putting them out to tender. This makes the system cost-effective and independent of individual suppliers. In particular, quality management tools have been developed so that the surveyor will receive direct feedback on errors to be corrected. The system also enables efficient use of data from other providers.
The system architecture may include both open source components and closed solutions. Information security has been comprehensively taken into account in the development work.
– The system has undergone security testing in accordance with the practices of the National Land Survey of Finland, and all the measures necessary to ensure data security were implemented during its development. An analysis of the data content was also performed to determine what data can be openly shared, Ilves explains.
More information
Risto Ilves, development manager, 029 531 5286, risto.ilves@maanmittauslaitos.fi