Table 1.
Volume in litres of lower trunk/root sections calculated from triangulation (Vtri) and QSM cylinder fitting (Vcyl) with 2σ in each case; the absolute difference between the two estimates; and the relative difference as a fraction of QSM volume, Vtot.
| tree | Vtri (l) | 2σ (l) | Vcyl (l) | 2σ (l) | Vcyl,tot (l) | 2σ (l) | Vtri−Vcyl (l) | Vtri−Vcyl/Vcyl,tot (%) |
|---|---|---|---|---|---|---|---|---|
| 1009 | 63.5 | 2.5 | 34.8 | 5.8 | 1784 | 89 | 28.7 | 1.6 |
| 213 | 262.7 | 16.4 | 274.4 | 32.7 | 4606 | 153 | −11.7 | −0.3 |
| 138 | 295.8 | 6.6 | 287.8 | 45.2 | 4138 | 101 | 8 | 0.2 |
| 1570 | 156.7 | 3.9 | 138.6 | 6.1 | 2882 | 107 | 18.1 | 0.6 |
| 255 | 496 | 40.4 | 634.4 | 68.8 | 8632 | 484 | −138.4 | −1.6 |