Fig. 8

Comparison between ground-measured and TLS-estimated DBH. a TLS-based versus field measured DBH for 5104 stems, with the TLS-based DBHs estimated using the “xy-range” approach (Fig. 3a). b TLS-based versus field measured DBHs for five hundred randomly selected stems, with the TLS-based DBHs calculated using a semi-automatic approach shown in Fig. 3b and 3c. c TLS-based versus field measured DBHs for large stems (above 1 m DBH as initially estimated by the “xy-range” approach). TLS-based DBHs were still calculated using the semi-automatic approach but every 1 m along the z axis up to 13 m, and the best match with field values was used here