Table 6 Fit and validation statistics for predicting miombo above-ground biomass (AGB, t∙ha−1) using three models
From: Model-based estimation of above-ground biomass in the miombo ecoregion of Zambia
Model | RMSE (6) | RMSE% (7) | MD (8) | Pseudo R2 (9) | RMSPE (4) | RMSPE% (5) | MPD (10) | Variablesa |
|---|---|---|---|---|---|---|---|---|
GAM (1) | 29.2 | 45Â % | 0.8 | 0.65 | 36.8 | 57Â % | 0 | \( {\hat{\mathrm{CC}}}_{\mathrm{HEMI}} \), NBR, NDMI, Bulk, CTI, D2hydro |
Sigmoidal (2) | 29.9 | 47Â % | 0.9 | 0.63 | 36.9 | 58Â % | 3.2 | \( {\hat{\mathrm{CC}}}_{\mathrm{HEMI}} \), \( {{\hat{\mathrm{CC}}}_{\mathrm{HEMI}}}^2 \), NDMI, ARVI.texture, Fire.late, AWC, pH, pH2 |
Exponential (3) | 36.1 | 56Â % | 0.6 | 0.47 | 39.7 | 62Â % | 0.4 | \( {\hat{\mathrm{CC}}}_{\mathrm{HEMI}} \), NDVI, AWC, Sand, Silt |