Table 8 Comparison of the accuracy of models for predicting soil heavy metal concentrations.
|  | Spectral information + Terrain factor | Spectral information + Terrain factor + Alteration information | ||||
|---|---|---|---|---|---|---|
RMSE | MAPE (%) | R2 | RMSE | MAPE (%) | R2 | |
Cu | 3.473 | 15.296 | 0.439 | 3.309 | 11.072 | 0.904 |
Zn | 6.147 | 10.432 | 0.161 | 5.065 | 8.010 | 0.523 |
Pb | 10.190 | 32.648 | 0.041 | 9.241 | 17.630 | 0.312 |
Cr | 13.428 | 15.039 | 0.055 | 17.491 | 15.327 | 0.394 |
Mn | 43.348 | 9.401 | 0.254 | 36.149 | 8.201 | 0.385 |
As | 2.832 | 15.514 | 0.270 | 1.180 | 13.134 | 0.674 |
Ni | 1.751 | 7.053 | 0.290 | 1.451 | 5.811 | 0.545 |
