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