SAGA-GIS Tool Library Documentation (v6.1.0)

Tool Gaussian Filter

The Gaussian filter is a smoothing operator that is used to 'blur' or 'soften' data and to remove detail and noise. The degree of smoothing is determined by the standard deviation. For higher standard deviations you need to use a larger search radius.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputGridGrid (input)INPUT--
OutputFiltered Grid (*)Grid (optional output)RESULT--
OptionsGrid systemGrid systemPARAMETERS_GRID_SYSTEM--
Standard DeviationFloating pointSIGMAThe standard deviation as percentage of the kernel radius, determines the degree of smoothing.Minimum: 0.000100
Default: 50.000000
Kernel TypeChoiceKERNEL_TYPEThe shape of the filter kernel.Available Choices:
[0] Square
[1] Circle
Default: 1
Kernel RadiusIntegerKERNEL_RADIUSThe kernel radius in cells.Minimum: 1
Default: 2
(*) optional

Command-line

Usage: saga_cmd grid_filter 1 [-INPUT <str>] [-RESULT <str>] [-SIGMA <double>] [-KERNEL_TYPE <str>] [-KERNEL_RADIUS <num>]
  -INPUT:<str>        	Grid
	Grid (input)
  -RESULT:<str>       	Filtered Grid
	Grid (optional output)
  -SIGMA:<double>     	Standard Deviation
	Floating point
	Minimum: 0.000100
	Default: 50.000000
  -KERNEL_TYPE:<str>  	Kernel Type
	Choice
	Available Choices:
	[0] Square
	[1] Circle
	Default: 1
  -KERNEL_RADIUS:<num>	Kernel Radius
	Integer
	Minimum: 1
	Default: 2