Fig. 1From: Forest in situ observations using unmanned aerial vehicle as an alternative of terrestrial measurementsTree map examples of the three stand complexity categories. The circles give the tree positions (XY) in meters, and the circle size represents the tree DBH multiplied by 10 for the illustration purpose. The statistics of the plot-specific mean DBH, mean tree height (H) and basal area (G) in each complexity category (mean +/− standard deviation) are presented in the right top corner of each mapBack to article page