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Table 4 Accuracy of stem curve modeling in the effective area

From: Seamless integration of above- and under-canopy unmanned aerial vehicle laser scanning for forest investigation

Tree group
(DBH, cm)
Stem curve - radius Stem curve – radius
(erroneous estimate excluded)
Stem curve - length Stem curve - length
(erroneous estimate excluded)
RMSE (cm)
(RMSE %)
Bias (cm)
(Bias %)
RMSE (cm)
(RMSE %)
Bias (cm)
(Bias %)
CLR PHC CLR PHC
5–10 4.33
55.82%
2.89
37.99%
2.83
36.49%
1.09
14.96%
101.70% 97.31% 105.77% 96.42%
10–15 8.68
90.17%
6.57
67.97%
8.27
88.54%
5.77
62.18%
79.02% 57.54% 76.70% 58.49%
>  15 6.29
31.72%
4.02
20.28%
5.23
26.13%
3.01
15.06%
78.57% 62.85% 79.89% 64.30%
All 6.64
45.67%
4.46
31.52%
5.68
39.30%
3.43
24.48%
80.41% 64.35% 80.97% 65.27%