Module Convergence Index (Search Radius)
Reference:
Koethe, R. & Lehmeier, F. (1996): SARA - System zur Automatischen Relief-Analyse. User Manual, 2. Edition [Dept. of Geography, University of Goettingen, unpublished]
- Author: O.Conrad (c) 2003
- Specification: grid
- Menu: Terrain Analysis|Morphometry
Parameters
| Name | Type | Identifier | Description | Constraints |
Input | Elevation | Grid (input) | ELEVATION | - | - |
Output | Convergence Index | Grid (output) | CONVERGENCE | - | - |
Options | Radius [Cells] | Floating point | RADIUS | - | Minimum: 1.000000 Default: 10.000000 |
Weighting | Parameters | WEIGHTING | - | 4 Parameters: - 1. Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian weighting Default: 0 - 2. Minimum: 0.000000 Default: 1.000000 - 3. Default: 1 - 4. Minimum: 0.000000 Default: 1.000000
|
Gradient | Boolean | SLOPE | - | Default: 0 |
Difference | Choice | DIFFERENCE | - | Available Choices: [0] direction to the center cell [1] center cell's aspect direction Default: 0 |
Command-line
Usage: saga_cmd ta_morphometry 2 -ELEVATION <str> [-CONVERGENCE <str>] [-RADIUS <str>] [-DISTANCE_WEIGHTING_DW_WEIGHTING <str>] [-DISTANCE_WEIGHTING_DW_IDW_POWER <str>] [-DISTANCE_WEIGHTING_DW_IDW_OFFSET <str>] [-DISTANCE_WEIGHTING_DW_BANDWIDTH <str>] [-SLOPE <str>] [-DIFFERENCE <str>]
-ELEVATION:<str> Elevation
Grid (input)
-CONVERGENCE:<str> Convergence Index
Grid (output)
-RADIUS:<str> Radius [Cells]
Floating point
Minimum: 1.000000
Default: 10.000000
-DISTANCE_WEIGHTING_DW_WEIGHTING:<str> Weighting Function
Choice
Available Choices:
[0] no distance weighting
[1] inverse distance to a power
[2] exponential
[3] gaussian weighting
Default: 0
-DISTANCE_WEIGHTING_DW_IDW_POWER:<str> Inverse Distance Weighting Power
Floating point
Minimum: 0.000000
Default: 1.000000
-DISTANCE_WEIGHTING_DW_IDW_OFFSET:<str> Inverse Distance Offset
Boolean
Default: 1
-DISTANCE_WEIGHTING_DW_BANDWIDTH:<str> Gaussian and Exponential Weighting Bandwidth
Floating point
Minimum: 0.000000
Default: 1.000000
-SLOPE:<str> Gradient
Boolean
Default: 0
-DIFFERENCE:<str> Difference
Choice
Available Choices:
[0] direction to the center cell
[1] center cell's aspect direction
Default: 0