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