Convergence Index (Search Radius)
- Author: O.Conrad (c) 2003
- Menu: Terrain Analysis | Morphometry
Description
Convergence Index (Search Radius)
References
- Koethe, R. & Lehmeier, F. (1996): SARA - System zur Automatischen Relief-Analyse. User Manual, 2. Edition [Dept. of Geography, University of Goettingen, unpublished].
Parameters
| Name | Type | Identifier | Description | Constraints |
Input | Elevation | grid, input | ELEVATION | - | - |
Output | Convergence Index | grid, output | CONVERGENCE | - | - |
Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
Gradient | boolean | SLOPE | - | Default: 0 |
Difference | choice | DIFFERENCE | - | Available Choices:
[0] direction to the center cell
[1] center cell's aspect direction
Default: 0 |
Radius [Cells] | floating point number | RADIUS | - | Minimum: 1.000000
Default: 10.000000 |
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 2 [-ELEVATION ] [-CONVERGENCE ] [-SLOPE ] [-DIFFERENCE ] [-RADIUS ] [-DW_WEIGHTING ] [-DW_IDW_POWER ] [-DW_BANDWIDTH ]
-ELEVATION: Elevation
grid, input
-CONVERGENCE: Convergence Index
grid, output
-SLOPE: Gradient
boolean
Default: 0
-DIFFERENCE: Difference
choice
Available Choices:
[0] direction to the center cell
[1] center cell's aspect direction
Default: 0
-RADIUS: Radius [Cells]
floating point number
Minimum: 1.000000
Default: 10.000000
-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