Terrain Surface Classification (Iwahashi and Pike)

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

Description

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, 86, 409-440. doi:10.1016/j.geomorph.2006.09.012.

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 number	`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 number	`CONV_EPSILON`	-	Minimum: 0.000000 Default: 0.000000
	Scale (Cells)	integer number	`TEXT_SCALE`	-	Minimum: 10 Default: 2
	Flat Area Threshold	floating point number	`TEXT_EPSILON`	maximum difference between original and median filtered elevation (3x3 moving window) that still is recognized flat	Minimum: 0.000000 Default: 1.000000

Command Line


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