Validation of the Mawas INDREX-II test site in Kalimantan was carried out based on eight transects along the 23-kilometre walking bridge. Within the transect each tree is observed. Observables included species, location, total tree height, height to first branch, and terrain height,
estimated biomass, meteorological data - rainfall, temperature; 3 gauges - and
hydrological data - water levels; 15 gauges.