Table 2 Description of the architectural traits measured with TLS or SIP methods
Method | Abbreviation | Mean (SD) | Unit | Description |
|---|---|---|---|---|
TLS | HTLS | 18.44 (2.45) | m | Tree height, assessed as the vertical distance between the highest and the lowest point |
DBHTLS | 23.84 (6.21) | cm | Diameter at breast height, assessed from least square circle fitting on a 2-cm-thick slice of points at 1.30Â m height | |
CPATLS | 36.04 (18.23) | m2 | Convex, horizontal crown projection area | |
CWATLS | 1.34 (0.76) | m | Crown width asymmetry; the horizontal distance between the horizontal crown projection centroid and stem base point | |
CWTLS | 6.89 (2.01) | m | Crown width; crown projection polygon extent, along the direction of CWATLS | |
SIP | HSIP | 18.84 (2.82) | m | Tree height |
DBHSIP | 25.52 (6.45) | cm | Diameter at breast height, measured within a selected plane (perpendicular to the image direction) | |
CASIP | 49.88 (25.41) | m2 | Non-convex, vertical crown projection area | |
CLSIP | 12.59 (3.81) | m | Crown length, assessed as the vertical distance between the highest and the lowest point of digitized live-crown envelope | |
CWSIP | 6.42 (2.38) | m | Crown width (CRSIPL + CRSIPR), where CRSIPL and CRSIPR are two crown radii observed in the image (on the left and right sides of the stem, respectively) | |
CWASIP | 1.08 (0.74) | m | Crown width asymmetry (CRSIPmax − CWSIP/2), where CRSIPmax is CRSIPL or CRSIPR, whichever greater | |
ALSIP | 49.81 (21.81) | m | Total length of stem and branches | |
MBLSIP | 2.06 (0.69) | m | Mean (per tree) 2nd-order branch length | |
MBASIP | 45.94 (13.31) | ° | Mean (per tree) branch angle | |
MBTSIP | 5.24 (1.82) | cm | Mean (per tree) 2nd-order branch thickness | |
FBHSIP | 8.73 (2.21) | m | Height of insertion of the first (lowest) branch |