Terrain Ruggedness Index (TRI)
- Author: O.Conrad (c) 2010
- Menu: Terrain Analysis | Morphometry
Description
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.
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 number | 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 number | DW_IDW_POWER | - | Minimum: 0.000000 Default: 2.000000 | |
| Bandwidth | floating point number | DW_BANDWIDTH | Bandwidth for exponential and Gaussian weighting | Minimum: 0.000000 Default: 1.000000 |
Command Line
Usage: saga_cmd ta_morphometry 16 [-DEM] [-TRI ] [-MODE ] [-RADIUS ] [-DW_WEIGHTING ] [-DW_IDW_POWER ] [-DW_BANDWIDTH ] -DEM: Elevation grid, input -TRI: Terrain Ruggedness Index (TRI) grid, output -MODE: Search Mode choice Available Choices: [0] Square [1] Circle Default: 1 -RADIUS: Search Radius integer number Minimum: 1 Default: 1 -DW_WEIGHTING: Weighting Function choice Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian Default: 0 -DW_IDW_POWER: Power floating point number Minimum: 0.000000 Default: 2.000000 -DW_BANDWIDTH: Bandwidth floating point number Minimum: 0.000000 Default: 1.000000