As you may remember, the European wide biomass mapping in the FCM project is conducted with the BIOMASAR approach developed by Gamma Remote Sensing. The same approach is used for the global biomass mapping conducted in the ESA CCI Biomass project. In the FCM project, the method is finetuned for European conditions and high resolution (20 m ) mapping. The approach is based on growing stock volume (GSV) estimation, which is subsequently converted to above and below ground biomass. The mapping uses only spaceborne radar sensors.