Fig. 7From: Comparison of length and dynamics of wood pieces in streams covered with coniferous and broadleaf forests mapped using orthophotos acquired by an unmanned aerial vehicleThe differences between the extracted and measured lengths of the wood pieces at both broadleaf forest (BF) and coniferous forest (CF) sites as functions of the measured diameter. Differences in length were calculated by subtracting the extracted length from the measured length, similar to Fig. 5Back to article page