Tool 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) 2003-17
Menu: Shapes|Polygons|Overlay

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 <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