SAGA-GIS Module Library Documentation (v2.1.3)

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 of Geography, University of Goettingen, unpublished]

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)ELEVATION--
OutputConvergence IndexGrid (output)CONVERGENCE--
OptionsRadius [Cells]Floating pointRADIUS-Minimum: 1.000000
Default: 10.000000
WeightingParametersWEIGHTING-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
GradientBooleanSLOPE-Default: 0
DifferenceChoiceDIFFERENCE-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