Table 1.
Land subsidence conditioning factors and their classes.
| Land Subsidence Factors | Classes | GIS Data Type | Scale |
|---|---|---|---|
| Slope angle (°) | (1) 0–10; (2) 10–20; (3) 20–30; (4) 30–40; (5) >40 | GRID | 1 m × 1 m |
| Distance to drift (m) | (1) 0–2; (2) 2–8; (3) 8–19; (4) 19–50; (5) >50 | Line | 1:5000 |
| Drift density (m/m2) | (1) 0–0.002; (2) 0.002–0.0448; (3) 0.0448–0.120; (4) 0.120–0.299; (5) 0.299–0.952 | Polygon | 1:5000 |
| Geology | (1) Gobangsan Group; (2) Sadong Group | Polygon | 1:50,000 |
| Distance to lineament (m) | (1) 0–10; (2) 10–20; (3) 20–30; (4) 30–60; (5) >60 | Line | 1:5000 |
| Lineament density (m/m2) | (1) 0–0.001; (2) 0.001–0.029; (3) 0.029–0.0435; (4) 0.0435–0.052; (5) 0.052–0.109 | Polygon | 1:5000 |
| Land use | (1) Mixed forest land; (2) Deciduous forest; (3) Mixed barren land; (4) Commercial area; (5) Coniferous forest; (6) Other grasses; (7) Transportation; (8) Natural grasses; (9) Field | Polygon | 1:50,000 |
| RMR | (1) 0.00366–1.26; (2) 1.26–1.54; (3) 1.54–1.93; (4) 1.93–2.79; (5) 2.79–4 | Polygon | 1:5000 |