Parameters and scoring function for the urban tree health (UTH) model. Adapted from Bond (2012).
| UTH | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| Crown ratio | No live crown | 1% to 20% | 21% to 40% | 41% to 60% | 61% to 80% | 81% to 100% |
| Opacity | No live crown | 1% to 20% | 21% to 40% | 41% to 60% | 61% to 80% | 81% to 100% |
| Vitality | No live crown | 1% to 20% | 21% to 40% | 41% to 60% | 61% to 80% | 81% to 100% |
| Growth | No live crown | < 5 cm | 5 to 10 cm | 10 to 15 cm | 15 to 20 cm | > 20 cm |
| Quality | No live crown | 1% to 20% | 21% to 40% | 41% to 60% | 61% to 80% | 81% to 100% |