Open APIs

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• Aluesarjat statistical database data as spatial data

  Aluesarjat - Key figures enables the use of statistical data by sub-region of Helsinki using the open WFS interface. The statistics are based on the data in the Helsinki region...

  • WFS

• Materials of Helsinki City Archives

  The Sinetti archive information system operated by the City of Helsinki Archives provides collection data from archived documents of the City of Helsinki. The document...

  • JSON

• Address API of Uusimaa

  You can use the address interface of Uusimaa to search for official addresses and their coordinates for the entire Uusimaa region. The interface provides the coordinates, postal...

  • JSON
  • XML

• Historical guide maps of the City of Helsinki

  Historical guide maps of Helsinki from 1940, 1952, 1962 and 1999. The guide maps include the following Information: place names, streets, roads and railway connections, public...

  • TIFF
  • WMS

• Linked Events Helsinki API

  You can use Helsinki’s Linked Events API to retrieve event data of several City of Helsinki divisions and the Helmet library service in a uniform format. The geographic data is...

  • JSON