Tool Terrain Surface Texture
Terrain surface texture as proposed by Iwahashi & Pike (2007) for subsequent terrain classification.
References
- Iwahashi, J. & Pike, R.J. (2007): Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature. Geomorphology, Vol. 86, pp. 409–440.
- Author: O.Conrad (c) 2012
- Menu: Terrain Analysis|Morphometry
Parameters
Name | Type | Identifier | Description | Constraints | |
---|---|---|---|---|---|
Input | Elevation | Grid, input | DEM | - | - |
Output | Texture | Grid, output | TEXTURE | - | - |
Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Flat Area Threshold | Floating point | EPSILON | maximum difference between original and median filtered elevation (3x3 moving window) that still is recognized flat | Minimum: 0.000000 Default: 1.000000 | |
Scale (Cells) | Integer | SCALE | - | Minimum: 1 Default: 10 | |
Method | Choice | METHOD | - | Available Choices: [0] counting cells [1] resampling 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 20 [-DEM <str>] [-TEXTURE <str>] [-EPSILON <double>] [-SCALE <num>] [-METHOD <str>] [-DW_WEIGHTING <str>] [-DW_IDW_POWER <double>] [-DW_BANDWIDTH <double>] -DEM:<str> Elevation Grid, input -TEXTURE:<str> Texture Grid, output -EPSILON:<double> Flat Area Threshold Floating point Minimum: 0.000000 Default: 1.000000 -SCALE:<num> Scale (Cells) Integer Minimum: 1 Default: 10 -METHOD:<str> Method Choice Available Choices: [0] counting cells [1] resampling 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