Surface Specific Points

Author: O.Conrad (c) 2001
Menu: Terrain Analysis | Terrain Classification

Description

Classification of raster cells representing surface-specific points.

References

Band, L.E. (1986): Topographic partition of watersheds with Digital Elevation Models. Water Resources Research, 22.1, 15-24. doi:10.1029/WR022i001p00015.
Peucker, T.K. & Douglas, D.H. (1975): Detection of surface-specific points by local parallel processing of discrete terrain elevation data. Computer Graphics and Image Processing, 4, 375-387. doi:10.1016/0146-664X(75)90005-2.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`ELEVATION`	-	-
Output	Surface Specific Points	grid, output	`RESULT`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Method	choice	`METHOD`	Algorithm for the detection of Surface Specific Points	Available Choices: [0] Flagging Neighbours of Highest Elevation [1] Opposite Neighbours [2] Flow Direction (down) [3] Flow Direction (up and down) [4] Peucker & Douglas Default: 1
	Threshold	floating point number	`THRESHOLD`	Threshold for Peucker & Douglas Algorithm	Default: 1.000000

Command Line


Usage: saga_cmd ta_morphometry 3 [-ELEVATION ] [-RESULT ] [-METHOD ] [-THRESHOLD ]
  -ELEVATION:      Elevation
	grid, input
  -RESULT:         Surface Specific Points
	grid, output
  -METHOD:
                        Method
                        	choice
                        	Available Choices:
                        	[0] Flagging Neighbours of Highest Elevation
                        	[1] Opposite Neighbours
                        	[2] Flow Direction (down)
                        	[3] Flow Direction (up and down)
                        	[4] Peucker & Douglas
                        	Default: 1
  -THRESHOLD:   Threshold
	floating point number
	Default: 1.000000