Tool Name	Difference
Tool ID	15
Library ID	shapes_polygons
Version	1.0
Author(s)	O.Conrad (c) 2003-25

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
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