[Qgis-user] How to 'difference' in existing layer

[Bernhard Ströbl]

Hi Lene,

try the DigitizingTools plugin [1]. The function that does just what you 
want is "Cut with polygon from another layer".
Be aware that this tool is intended for use during digitizing: you can 
decide which features of layer A to cut and which features of layer B to 
use for cutting by making selections. It is possible to cut all features 
of layer A with all features of layer B, though.

Bernhard

[1] http://plugins.qgis.org/plugins/DigitizingTools/

Am 13.02.2017 um 08:45 schrieb Lene Fischer:
> Hi
>
>
>
> I have two layers of polygons
>
> I want to make holes in the first layer using the second layer as mask.
>
>
>
> I can do this by function ‘Difference’ – but the result is a third layer.
>
> I would like the holes in the polygons to be in the first (existing) layer.
>
>
>
> Any suggestions J
>
>
>
> Regards
>
>
>
>
>
> *Lene Fischer***
>
> Associate Professor
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>
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