SAGA-GIS Module Library Documentation (v2.3.0)

Module Surface Specific Points

References:
Peucker, T.K. and 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

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)ELEVATION--
OutputResultGrid (output)RESULT--
OptionsGrid systemGrid systemPARAMETERS_GRID_SYSTEMGrid system-
MethodChoiceMETHODAlgorithm for the detection of Surface Specific PointsAvailable Choices:
[0] Mark Highest Neighbour
[1] Opposite Neighbours
[2] Flow Direction
[3] Flow Direction (up and down)
[4] Peucker & Douglas
Default: 1
ThresholdFloating pointTHRESHOLDThreshold for Peucker & Douglas AlgorithmDefault: 2.000000

Command-line

Usage: saga_cmd ta_morphometry 3 [-ELEVATION <str>] [-RESULT <str>] [-METHOD <str>] [-THRESHOLD <double>]
  -ELEVATION:<str>   	Elevation
	Grid (input)
  -RESULT:<str>      	Result
	Grid (output)
  -METHOD:<str>      	Method
	Choice
	Available Choices:
	[0] Mark Highest Neighbour
	[1] Opposite Neighbours
	[2] Flow Direction
	[3] Flow Direction (up and down)
	[4] Peucker & Douglas
	Default: 1
  -THRESHOLD:<double>	Threshold
	Floating point
	Default: 2.000000