Pinus roxburghii / Height
Chir pine height from D, inverse (M5)
HeightPinus roxburghii · PinaceaeNepalnaturalRead from the original paper
© Hildegard Klein · CC BY · iNaturalistEquation
As printed (Table 4, M5)
height= 27.261 + -227 * (1/dbh)
In this library's units, ready to compute (m)
Height = 27.261 - 227 / DD- Diameter at breast height (1.3 m), cm
r2 is the adjusted R2 as printed in Table 6 (RMSE 5.731). Fitted on the 80% training split of the FRA 2018 sample; the paper's n is ambiguous (610 'sample plots' vs 610 trees in Table 3), so n_trees and ranges are left out. Table 6 coefficient columns differ from Table 4; Table 4 (printed formulas, consistent with Table 3 class means) is used.
Source
doi:10.11648/j.ajbes.20241003.12 · Open access · copy we read
- R²
- 0.511
- Method
- inverse regression (lowest-ranked model in the paper)
- Where
- Nepal, Forest Resource Assessment 2018 plots
- Last checked
- 2026-11-02
Calculate
4.56
Height (m)
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 10 | 4.56 | 4.56 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 25 | 18.2 | 18.2 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 50 | 22.7 | 22.7 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Chir pine height from D (M1, power) · Thapa et al. 2013 · DBH
- Chir pine height from D, cubic (M3) · Upadhyay & Khadka 2024 · DBH
- Chir pine height from D, linear (M1) · Upadhyay & Khadka 2024 · DBH
- Chir pine height from D, quadratic (M2) · Upadhyay & Khadka 2024 · DBH
- Chir pine height from D, cubic (M3) · same paper · Height
- Chir pine height from D, linear (M1) · same paper · Height
- Chir pine height from D, quadratic (M2) · same paper · Height