# Terrain Ruggedness Index (TRI)

O.Conrad (c) 2010
References:
Riley, S.J., De Gloria, S.D., Elliot, R. (1999): A Terrain Ruggedness that Quantifies Topographic Heterogeneity. Intermountain Journal of Science, Vol.5, No.1-4, pp.23-27. online.

## Parameters

Grid system
Grid system
  Grid system
Elevation
Input Grid
Terrain Ruggedness Index (TRI)
Output Grid
Radius (Cells)
Integer
  Minimum: 1.0
Weighting
Parameters