Difference

Author(s)	O.Conrad (c) 2003-25
Library ID	shapes_polygons
Tool ID	15
Version	1.0
Menu	Shapes \| Polygons \| Overlay

Description

Calculates the geometric difference of the overlaid 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.

References

Clipper Homepage

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Layer A	shapes, input	`A`	-	-
Input	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 ] [-B ] [-RESULT ] [-SPLIT ]
  -A:        Layer A
	shapes, input
  -B:        Layer B
	shapes, input
  -RESULT:   Difference
	shapes, output
  -SPLIT:    Split Parts
	boolean
	Default: 1