Table 2 Landform classes defined by topographic indices and slope (Weiss 2001).
Landform Class | TPI500 | TPI2000 | Slope |
|---|---|---|---|
deep streams | ≤-1 | ≤-1 |  |
shallow valleys and mid-slope drainage pathways | ≤-1 | >-1 and <1 |  |
upland drainage are | ≤-1 | ≥1 |  |
U-shaped valleys | >-1 and <1 | ≤-1 |  |
plains | >-1 and <1 | >-1 and <1 | ≤5° |
open slopes | >-1 and <1 | >-1 and <1 | >5° |
upper slopes and mesas | >-1 and <1 | ≥1 |  |
local ridges and hills in large valleys | ≥1 | ≤-1 |  |
mid-slope of ridges and small hills in plains | ≥1 | >-1 and <1 |  |
high ridges | ≥1 | ≥1 |  |