Table 6.

Comparison of model performance metrics in training and testing phases across all zones.

Model	Phase	Mean R²	Mean RMSE	ΔR² (Train - Test)	ΔRMSE (Test - Train)
XGBoost	Training	0.934	0.942	0.086	0.612
	Testing	0.848	1.554
RF	Training	0.832	1.214	0.084	0.492
	Testing	0.748	1.706
SVM	Training	0.918	1.144	0.096	0.612
	Testing	0.822	1.756