| Geology (a) | Bedrock (a1) | Igneous rock | Sedimentary rock | Metamorphic rock | - | - |
| Intrusion presence (a2) | Yes | No | - | - | - |
| Weathering (a3) | Weathered rock | Soft and moderate rock | Hard rock | - | - |
| Fault presence (a4) | Yes | No | - | - | - |
| Fold presence (a5) | Yes | No | - | - | - |
| No. of discontinuity (a6) | 0 | 1 | 2 | 3 or more | - |
| Discontinuity orientation (a7) | Dip direction | Reverse | Parallel | Normal | None |
| Discontinuity spacing (a8) | Very close | Close | Moderate | Wide | None |
| Soil (b) | Soil type (b1) | Wet | Moderate | Slightly dry | Others (dry, immature soil, eroded soil) | - |
| Soil depth (b2) | Less than 30 cm | 30-60 cm | 60-90 cm | More than 90 cm | - |
| Soil texture (b3) | Sandy | Sandy loam | Clay | - | - |
| Soil structure (b4) | Granular | Blocky | Others | None | - |
| Soil wetness (b5) | Wet | Slightly wet | Moderate | Slightly dry | Dry |
| Rock exposure (b6) | Less than 5% | 5-20% | 20-30% | More than 30% | - |
| Talus presence (b7) | Yes | No | - | - | - |
| Topography (c) | Peak elevation (c1) | Continuous variable (0-979 m) |
| Location (c2) | Gentle hills | Hills | Mountainous | - | - |
| Planar shape (c3) | Linear | Curved | Concave | Mixed | - |
| Longitudinal shape (c4) | Linear | Curved | Concave | Mixed | - |
| Slope angle (c5) | Less than 10° | 10-20° | 20-30° | More than 30° | - |
| Hydrology (d) | Groundwater inflow possibility (d1) | Yes | No | - | - | - |
| Stream presence (d2) | Yes | No | - | - | - |
| Spring, pond and reservoir presence (d3) | Yes | No | - | - | - |
| Forest (e) | Forest type (e1) | Broadleaved | Needle-leaved | Mixed | Others | - |
| Symptom (f) | Crack presence (f1) | Yes | No | - | - | - |
| Step presence (f2) | Yes | No | - | - | - |
| Structure abnormality presence (f3) | Yes | No | - | - | - |
| Tree abnormality presence (f4) | Yes | No | - | - | - |
| Groundwater seepage presence (f5) | Yes | No | - | - | - |