Module Terrain Ruggedness Index (TRI)

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.

Author: O.Conrad (c) 2010
Specification: grid
Menu: Terrain Analysis|Morphometry

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	Grid (input)	`DEM`	-	-
Output	Terrain Ruggedness Index (TRI)	Grid (output)	`TRI`	-	-
Options	Radius (Cells)	Integer	`RADIUS`	-	Minimum: 1 Default: 1
Options	Weighting	Parameters	`WEIGHTING`	-	4 Parameters: - 1. Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian weighting Default: 0 - 2. Minimum: 0.000000 Default: 1.000000 - 3. Default: 1 - 4. Minimum: 0.000000 Default: 1.000000

Command-line

Usage: saga_cmd ta_morphometry 16 -DEM <str> [-TRI <str>] [-RADIUS <num>] [-DISTANCE_WEIGHTING_DW_WEIGHTING <str>] [-DISTANCE_WEIGHTING_DW_IDW_POWER <str>] [-DISTANCE_WEIGHTING_DW_IDW_OFFSET <str>] [-DISTANCE_WEIGHTING_DW_BANDWIDTH <str>]
  -DEM:<str>                             	Elevation
	Grid (input)
  -TRI:<str>                             	Terrain Ruggedness Index (TRI)
	Grid (output)
  -RADIUS:<num>                          	Radius (Cells)
	Integer
	Minimum: 1
	Default: 1
  -DISTANCE_WEIGHTING_DW_WEIGHTING:<str> 	Weighting Function
	Choice
	Available Choices:
	[0] no distance weighting
	[1] inverse distance to a power
	[2] exponential
	[3] gaussian weighting
	Default: 0
  -DISTANCE_WEIGHTING_DW_IDW_POWER:<str> 	Inverse Distance Weighting Power
	Floating point
	Minimum: 0.000000
	Default: 1.000000
  -DISTANCE_WEIGHTING_DW_IDW_OFFSET:<str>	Inverse Distance Offset
	Boolean
	Default: 1
  -DISTANCE_WEIGHTING_DW_BANDWIDTH:<str> 	Gaussian and Exponential Weighting Bandwidth
	Floating point
	Minimum: 0.000000
	Default: 1.000000