Tool Sieve Classes

The 'Sieve Classes' tool counts the number of adjacent cells sharing the same value (the class identifier). Areas that are formed by less cells than specified by the treshold will be removed (sieved), i.e. they are set to no-data.

Author: O.Conrad (c) 2014
Menu: Grid|Filter

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Classes	Grid (input)	`INPUT`	-	-
Output	Sieved Classes (*)	Grid (optional output)	`OUTPUT`	-	-
Options	Grid system	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Neighbourhood	Choice	`MODE`	Neumann: the four horizontally and vertically neighboured cells; Moore: all eight adjacent cells	Available Choices: [0] Neumann [1] Moore Default: 0
	Minimum Threshold	Integer	`THRESHOLD`	Minimum number of cells in a group of adjacent cells.	Minimum: 2 Default: 4
	Class Selection	Choice	`ALL`	-	Available Choices: [0] single class [1] all classes Default: 1
	Class Identifier	Floating point	`CLASS`	-	Default: 1.000000
(*) optional

Command-line

Usage: saga_cmd grid_filter 15 [-INPUT <str>] [-OUTPUT <str>] [-MODE <str>] [-THRESHOLD <num>] [-ALL <str>] [-CLASS <double>]
  -INPUT:<str>    	Classes
	Grid (input)
  -OUTPUT:<str>   	Sieved Classes
	Grid (optional output)
  -MODE:<str>     	Neighbourhood
	Choice
	Available Choices:
	[0] Neumann
	[1] Moore
	Default: 0
  -THRESHOLD:<num>	Minimum Threshold
	Integer
	Minimum: 2
	Default: 4
  -ALL:<str>      	Class Selection
	Choice
	Available Choices:
	[0] single class
	[1] all classes
	Default: 1
  -CLASS:<double> 	Class Identifier
	Floating point
	Default: 1.000000