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Table 2 Landform classes defined by topographic indices and slope (Weiss 2001).

From: Identifying malaria vector breeding habitats with remote sensing data and terrain-based landscape indices in Zambia

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