Table 2.
Results of the final generalized linear models (GLMs).
| Model calibration | All samples (n = 16) | Extreme values off (n = 14) |
|---|---|---|
| Final GLM (α + βxi) | 1.287 + 0.032 (greenness) + 7.8–6 (wasteland) | 1.179 + 0.024 (greenness) |
| AIC | 18.2 | 8.0 |
| D2 | 0.785 | 0.466 |
| Correlation (fitted – obs) | r = 0.89 (p < 0.001); rs = 0.79 (p < 0.001) | r = 0.68 (p = 0.007); rs = 0.69 (p = 0.006) |
| Residuals | ||
| Normality (K-S test) | Normally distributed (p = 0.829) | Normally distributed (p = 0.826) |
| Homoscedasticity | Acceptable | Acceptable |
| Spatial autocorrelation | No autocorrelation (Moran’s I p > 0.05) | No autocorrelation (Moran’s I p > 0.05) |
| Cook’s distance | One observation > 1 | All observations < 0.5 |
| Abbreviations: α, intercept; β, regression coefficient; xi, environmental variable; AIC, Akaike’s Information Criterion; D2, explained deviance (comparable to explained variance in least-square regression); fitted, fitted values; greenness, greenness of tasseled cap transformation; K-S test, Kolmogorov–Smirnov test; obs, observed values; r, Pearson’s correlation coefficient; rs, Spearman’s rank order correlation coefficient; wasteland, unmanaged grassland land use classes. | ||