SAGA-GIS Tool Library Documentation (v8.4.1)

Tool Iterative Truncation

The tool allows one to perform an iterative truncation to a target average. This operation iteratively removes the highest values from the input grid until the average of all grid values matches the user-specified target average. Instead of simply removing the highest cell values, these values can also be replaced by a substitute value.
An example application is surface soil cleanup, where the highest soil contaminant concentrations are removed until targeted post-remediation concentrations are reached. In this case, the substitute value would be set to the concentration of clean fill.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputInputGrid, inputINPUTGrid to analyse.-
OutputRemoved CellsGrid, outputREMOVEDOutput grid showing the removed cells (1/NoData).-
Output (*)Grid, output, optionalOUTPUTThe modified input grid.-
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
Target AverageFloating pointTARGETThe target average.Default: 100.000000
MethodChoiceMETHODChoose a mode of operation.Available Choices:
[0] remove cell values
[1] replace cell values
Default: 0
Substitute ValueFloating pointSUBSTITUTEThe value with which the removed cell values are replaced.Default: 0.000000
(*) optional

Command-line

Usage: saga_cmd grid_analysis 29 [-INPUT <str>] [-REMOVED <str>] [-OUTPUT <str>] [-TARGET <double>] [-METHOD <str>] [-SUBSTITUTE <double>]
  -INPUT:<str>        	Input
	Grid, input
  -REMOVED:<str>      	Removed Cells
	Grid, output
  -OUTPUT:<str>       	Output
	Grid, output, optional
  -TARGET:<double>    	Target Average
	Floating point
	Default: 100.000000
  -METHOD:<str>       	Method
	Choice
	Available Choices:
	[0] remove cell values
	[1] replace cell values
	Default: 0
  -SUBSTITUTE:<double>	Substitute Value
	Floating point
	Default: 0.000000