Tool Terrain Ruggedness Index (TRI)
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
- Menu: Terrain Analysis|Morphometry
Parameters
| Name | Type | Identifier | Description | Constraints |
Input | Elevation | Grid, input | DEM | - | - |
Output | Terrain Ruggedness Index (TRI) | Grid, output | TRI | - | - |
Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Search Mode | Choice | MODE | - | Available Choices: [0] Square [1] Circle Default: 1 |
Search Radius | Integer | RADIUS | radius in cells | Minimum: 1 Default: 1 |
Weighting Function | Choice | DW_WEIGHTING | - | Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian Default: 0 |
Power | Floating point | DW_IDW_POWER | - | Minimum: 0.000000 Default: 2.000000 |
Bandwidth | Floating point | DW_BANDWIDTH | Bandwidth for exponential and Gaussian weighting | Minimum: 0.000000 Default: 1.000000 |
Command-line
Usage: saga_cmd ta_morphometry 16 [-DEM <str>] [-TRI <str>] [-MODE <str>] [-RADIUS <num>] [-DW_WEIGHTING <str>] [-DW_IDW_POWER <double>] [-DW_BANDWIDTH <double>]
-DEM:<str> Elevation
Grid, input
-TRI:<str> Terrain Ruggedness Index (TRI)
Grid, output
-MODE:<str> Search Mode
Choice
Available Choices:
[0] Square
[1] Circle
Default: 1
-RADIUS:<num> Search Radius
Integer
Minimum: 1
Default: 1
-DW_WEIGHTING:<str> Weighting Function
Choice
Available Choices:
[0] no distance weighting
[1] inverse distance to a power
[2] exponential
[3] gaussian
Default: 0
-DW_IDW_POWER:<double> Power
Floating point
Minimum: 0.000000
Default: 2.000000
-DW_BANDWIDTH:<double> Bandwidth
Floating point
Minimum: 0.000000
Default: 1.000000