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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 45 % 0.8 0.65 36.8 57 % 0 \( {\hat{\mathrm{CC}}}_{\mathrm{HEMI}} \), NBR, NDMI, Bulk, CTI, D2hydro
Sigmoidal (2) 29.9 47 % 0.9 0.63 36.9 58 % 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 56 % 0.6 0.47 39.7 62 % 0.4 \( {\hat{\mathrm{CC}}}_{\mathrm{HEMI}} \), NDVI, AWC, Sand, Silt
  1. aSee Tables 2 and 3 for descriptions of remotely-sensed, environmental and disturbance variables