Convergence Index (Search Radius)

Author: O.Conrad (c) 2003
Menu: Terrain Analysis | Morphometry

Description

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 of Geography, University of Goettingen, unpublished].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