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 number | 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 number | 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 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 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 number
Minimum: 0.000000
Default: 1.000000
-SCALE:<num> Scale (Cells)
integer number
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 number
Minimum: 0.000000
Default: 2.000000
-DW_BANDWIDTH:<double> Bandwidth
floating point number
Minimum: 0.000000
Default: 1.000000