Module Difference
Calculates the geometric difference of the overlayed polygon layers, i.e. layer A less layer B. Sometimes referred to as 'Erase' command.
Uses the free and open source software library Clipper created by Angus Johnson.
Clipper Homepage
Clipper at SourceForge
- Author: O.Conrad (c) 2003-13
- Specification: grid
- Menu: Shapes|Polygons|Overlay
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Layer A | Shapes (input) | A | - | - |
| Layer B | Shapes (input) | B | - | - |
| Output | Difference | Shapes (output) | RESULT | - | - |
| Options | Split Parts | Boolean | SPLIT | Set true if you want multipart polygons to become separate polygons. | Default: 1 |
Command-line
Usage: saga_cmd shapes_polygons 15 -A <str> -B <str> [-RESULT <str>] [-SPLIT <str>]
-A:<str> Layer A
Shapes (input)
-B:<str> Layer B
Shapes (input)
-RESULT:<str> Difference
Shapes (output)
-SPLIT:<str> Split Parts
Boolean
Default: 1