Tool Name	Update
Tool ID	18
Library ID	shapes_polygons
Version	1.0
Author(s)	O.Conrad (c) 2003-25

Description

Updates features of layer A with the features of layer B, i.e. all features of layer B will be supplemented with the difference of layer A less layer B plus. It is assumed, that both input layers share the same attribute structure.
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
Update	shapes, output	RESULT
Options
Split Parts	boolean	SPLIT	Set true if you want multipart polygons to become separate polygons.	Default: 1