| Group | Variable | Reference | Unit |
| Pedology | Soil type | [16] | Class name |
| Spectral | NDVI | [17] | Non-dimensional |
| Topography | Elevation | [18] | m |
| Slope | Degree (˚) | ||
| Aspect | Degree (˚) | ||
| Geomorfology | Geom | [19] | Class name |
| Geology | Dist. of geological structures | km | |
| Lithology | Class name | ||
| Max. Age of rocks | Millions of years (Ma) | ||
| Average age of rocks | |||
| Min. age of rocks | |||
| Climate | precipitation | [20] | mm |
| Max.temp. | ˚C | ||
| Avg. temp. | ˚C | ||
| Min. temp. | ˚C | ||
| Range temp. | ˚C |