Solar energy potential map, Helsinki
Helsinki metropolitan area published an open data portal showing the solar potential of the area's building on an interactive 3D map.
The data contains the photovoltaic production potential calculated per building, provided that the entire area suitable for solar panels is covered with solar panels. When calculating the annual electricity production potential, it was assumed that the efficiency of the solar panels is 15% and that they have been installed parallel to the roof on flat roofs as well.