The WSL has an extensive collection of infrared aerial photos from flights which were carried out for the Sanasilva inventory from 1983–1991. These are mainly images with a scale of 1:9'000 from repeated flights (time series).
Copies of grayscale airphotos from the regular official flights of the Swisstopo were used for the first and second NFI. Those images date from 1979–1984 and 1987–1993. The scales vary between 1:22'000 und 1:30'000.
For further inquiries contact Daniel Uebersax.