SAGA-GIS Module Library Documentation (v2.2.2)

Module Downslope Distance Gradient

Calculation of a new topographic index to quantify downslope controls on local drainage.

References:
- Hjerdt, K.N., McDonnell, J.J., Seibert, J. Rodhe, A. (2004): 'A new topographic index to quantify downslope controls on local drainage', Water Resources Research, 40

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)DEM--
OutputGradientGrid (output)GRADIENT--
Gradient Difference (*)Grid (optional output)DIFFERENCEDifference to local gradient.-
OptionsVertical DistanceFloating pointDISTANCE-Minimum: 0.000000
Default: 10.000000
OutputChoiceOUTPUT-Available Choices:
[0] distance
[1] gradient (tangens)
[2] gradient (degree)
Default: 2
(*) optional

Command-line

Usage: saga_cmd ta_morphometry 9 [-DEM <str>] [-GRADIENT <str>] [-DIFFERENCE <str>] [-DISTANCE <str>] [-OUTPUT <str>]
  -DEM:<str>       	Elevation
	Grid (input)
  -GRADIENT:<str>  	Gradient
	Grid (output)
  -DIFFERENCE:<str>	Gradient Difference
	Grid (optional output)
  -DISTANCE:<str>  	Vertical Distance
	Floating point
	Minimum: 0.000000
	Default: 10.000000
  -OUTPUT:<str>    	Output
	Choice
	Available Choices:
	[0] distance
	[1] gradient (tangens)
	[2] gradient (degree)
	Default: 2