Table 4: Mean values of roughness metrics by landform delineated by roughness metrics.

Roughness metric
Top of Ridge Top Slope Lower Slope Valley Bottom Shale Hill

SD of curvature (1)2.273.102.503.192.23
Pit fill metric (2)0.080.010.030.300.02
SD of slope (3)2.493.492.914.002.85
Spline (4)0.210.290.290.490.26