Fig. 3. Average monitoring costs per hectare per year for four Peruvian REDD+ projects (black) and eight commonly used monitoring methods/technologies (grey): OMRS = Optical Medium Resolution Sensor, Landsat-5, TM; NFMA = National Forest Monitoring and Assessment for five countries; OHRS = Optical High Resolution Sensor, Quickbird; GBI (B) = Ground-based inventories, Noel Kempff, Bolivia; OVHRS = Optical Very High Resolution Sensor, Quickbird and Worldview-1; Indonesia (A) = Airborne monitoring, Ulu Masen Project, Indonesia; LiDAR = airborne Light Detection and Ranging, Indonesia (data from Böttcher et al. 2009 in which the primary source references are cited).

Fig. 3