The main focus of the Smart Forest laboratory is the precise (at centimeter level) digitalization of forests. Precise remote sensing provides information at the foliage, tree and forest level. Until UAVs (Unmanned Aerial Vehicles) became commercially available, on one hand, the common research methodology was to select a forest plot and conduct measurements in a group of trees and use those results scale them up for similar forests in larger areas. On the other hand, when large forests areas were captured in satellite images, we could see the forests and roughly scale the results down to tree level. These two contrasting views of trees and forests, are thus integrated into one with the use of UAVs. Since UAVs lets us see the trees and the forests, it is the most suitable tool for collecting information with high spatial and temporal resolution.Our forest research sites are located in the Prefectures of Yamagata, Miyagi and Iwate in Northeastern Japan. These forests sites are markedly different among each other, in terms of tree species, composition, climate characteristics, slope exposure and topographical conditions. Some of them are plantations and some of them are natural forests. As shown in the illustration, the sites are Koiwainojo, Shonai Coastal Forest, YURF, Watanoha Coastal Forest,  Zao Mountains and Yonezawa Mountains.