Calculating CH and RW from Vegetation Sample PointsTo evaluate the relative accuracy of the SfM-derived and LiDAR-derived CHMs, we calculated the CH and the RW from row segments in the CHMs from data set #3 and compared them with ground measurements. The extraction of segments of vegetation points is shown in Figure 2. We filtered out all the points with a height lower than 10 cm to ensure ground points did not impact the calculation. Within each segment, we calcu- lated CH by finding an optimized top percentile of the z values. Similarly, we calculated the RW by finding an optimized difference between a well-above average percentile and a well-below average percentile of y values. The optimal values were determined by find- ing the smallest RMSE between the derived metrics and the field measurements [23]. Spe-