Tool Terrain Surface Classification (Iwahashi and Pike)

Terrain surface classification as proposed by Iwahashi & Pike (2007).

References

Iwahashi, J. & Pike, R.J. (2007): Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature. Geomorphology, Vol. 86, pp. 409–440.

Author: O.Conrad (c) 2012
Menu: Terrain Analysis|Terrain Classification

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	Grid, input	`DEM`	-	-
	Slope (*)	Grid, input, optional	`SLOPE`	-	-
	Convexity (*)	Grid, input, optional	`CONVEXITY`	-	-
	Texture (*)	Grid, input, optional	`TEXTURE`	-	-
Output	Landforms	Grid, output	`LANDFORMS`	-	-
Options	Grid System	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Recalculate	Boolean	`CONV_RECALC`	-	Default: 0
	Recalculate	Boolean	`TEXT_RECALC`	-	Default: 0
	Number of Classes	Choice	`TYPE`	-	Available Choices: [0] 8 [1] 12 [2] 16 Default: 2
	Scale (Cells)	Integer	`CONV_SCALE`	-	Minimum: 1 Default: 10
	Laplacian Filter Kernel	Choice	`CONV_KERNEL`	-	Available Choices: [0] four-neighbourhood [1] eight-neihbourhood [2] eight-neihbourhood (distance based weighting) Default: 0
	Type	Choice	`CONV_TYPE`	-	Available Choices: [0] convexity [1] concavity Default: 0
	Flat Area Threshold	Floating point	`CONV_EPSILON`	-	Minimum: 0.000000 Default: 0.000000
	Scale (Cells)	Integer	`TEXT_SCALE`	-	Minimum: 10 Default: 2
	Flat Area Threshold	Floating point	`TEXT_EPSILON`	maximum difference between original and median filtered elevation (3x3 moving window) that still is recognized flat	Minimum: 0.000000 Default: 1.000000
(*) optional

Command-line

Usage: saga_cmd ta_morphometry 22 [-DEM <str>] [-SLOPE <str>] [-CONVEXITY <str>] [-CONV_RECALC <str>] [-TEXTURE <str>] [-TEXT_RECALC <str>] [-LANDFORMS <str>] [-TYPE <str>] [-CONV_SCALE <num>] [-CONV_KERNEL <str>] [-CONV_TYPE <str>] [-CONV_EPSILON <double>] [-TEXT_SCALE <num>] [-TEXT_EPSILON <double>]
  -DEM:<str>            	Elevation
	Grid, input
  -SLOPE:<str>          	Slope
	Grid, input, optional
  -CONVEXITY:<str>      	Convexity
	Grid, input, optional
  -CONV_RECALC:<str>    	Recalculate
	Boolean
	Default: 0
  -TEXTURE:<str>        	Texture
	Grid, input, optional
  -TEXT_RECALC:<str>    	Recalculate
	Boolean
	Default: 0
  -LANDFORMS:<str>      	Landforms
	Grid, output
  -TYPE:<str>           	Number of Classes
	Choice
	Available Choices:
	[0] 8
	[1] 12
	[2] 16
	Default: 2
  -CONV_SCALE:<num>     	Scale (Cells)
	Integer
	Minimum: 1
	Default: 10
  -CONV_KERNEL:<str>    	Laplacian Filter Kernel
	Choice
	Available Choices:
	[0] four-neighbourhood
	[1] eight-neihbourhood
	[2] eight-neihbourhood (distance based weighting)
	Default: 0
  -CONV_TYPE:<str>      	Type
	Choice
	Available Choices:
	[0] convexity
	[1] concavity
	Default: 0
  -CONV_EPSILON:<double>	Flat Area Threshold
	Floating point
	Minimum: 0.000000
	Default: 0.000000
  -TEXT_SCALE:<num>     	Scale (Cells)
	Integer
	Minimum: 10
	Default: 2
  -TEXT_EPSILON:<double>	Flat Area Threshold
	Floating point
	Minimum: 0.000000
	Default: 1.000000