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 threshold 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, output, optional | 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 number | 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 number | 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, output, optional
-MODE:<str> Neighbourhood
choice
Available Choices:
[0] Neumann
[1] Moore
Default: 0
-THRESHOLD:<num> Minimum Threshold
integer number
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 number
Default: 1.000000