Amount of solar radiant energy on the roofs in the Helsinki Metropolitan Area

Map data that shows the amount of solar radiant energy calculated on the roofs of buildings in the Helsinki metropolitan area.

The solar radiant energy has been modelled on roofs in pixels of 50 cm (kWh/m2/year) with the help of point cloud data from cities. The point cloud data dates from 2013 for Espoo, from 2012 for Vantaa, and from 2008–2013 for Helsinki. The modelling takes into account direct and cloud-reflected radiation, the shape and direction of the roof, shade from buildings and trees, as well as the position of the sun at different times of the day and seasons of the year.

The data was completed in the Decumanus project and was produced by Eurosense, a Belgian geographic information services company participating in the project.

The data has been published in HSY’s open data map service, where it can be viewed. The data cannot be downloaded from the service, but it can be accessed from a wms-, or wfs-api.

If necessary, you can also inquire about the data by email: avoindata (at)


Additional Info

Collection Open Data
Maintainer Helsingin seudun ympäristöpalvelut (HSY)
Maintainer email
Maintainer website
Links to additional information
Geographical coverage
Last modified 27.03.2024
Show change log
Created on 08.03.2018