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 of Geography, University of Goettingen, unpublished]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