Orthophotos of the Helsinki metropolitan area

The orthophotos were taken at 20 cm/pix terrain resolution in the summertime, and the regional coverage of the materials varies slightly from year to year. Data is currently provided only via HSY's interfaces as a colour orthophoto mosaic (RGB image). When necessary, you can inquire about false-colour photos at avoindata@hsy.fi. The data is in the ETRS-GK25 coordinate system. The data have been implemented as a joint procurement and the party responsible for the procurement was the Helsinki Region Environmental Services Authority (HSY) municipal federation.

Regional coverage:

  • 2019: Helsinki, Espoo, Vantaa, Kauniainen, Kirkkonummi ja Kerava
  • 2017: Helsinki, Espoo, Vantaa, Kauniainen, Kirkkonummi, Kerava ja Nurmijärvi
  • 2015: Helsinki, Espoo, Vantaa, Kauniainen, Kirkkonummi, Kerava ja Sipoo

The copyright notice must indicate all the parties involved in the procurement and the year of the material. E.g. Orthophoto (c) Municipalities in the region, HSY, HSL the Finnish Defence Forces 2019

The orthophoto can be viewed in HSY’s open map service. The material can be accessed via HSY’s interfaces. Individual TIFF files are not available for download through this service.

More information about HSY’s interfaces.

Data and Resources

Additional information

Administrator Helsingin seudun ympäristöpalvelut HSY
Administrator's webpage http://www.hsy.fi/avoindata
Published 09.03.2018
Updated 08.12.2020
Update frequency
More information
  1. https://www.hsy.fi/ilmanlaatu-ja-ilmasto/paikkatiedot/avoin-data-rajapinnat/
  2. https://kartta.hsy.fi
Geographical coverage
Time series starts 2015
Time series accuracy
Licence Creative Commons Attribution 4.0
How to reference Source: Orthophotos of the Helsinki metropolitan area . The maintainer of the dataset is Helsingin seudun ympäristöpalvelut HSY. The dataset has been downloaded from Helsinki Region Infoshare service on 25.09.2021 under the license Creative Commons Attribution 4.0.


Creative Commons Attribution 4.0
CC-BY-4.0 [Open Data]

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