Hi Lene, I'm not sure if I understood the question.
I would try the clip operation. You use the second layer to cut the first layer. But the result is another layer. But a layer with holes :-) I hope it helps! J. Gustavo Às 22:41 de 13-02-2017, Lene Fischer escreveu: > 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 > > > > *University of Copenhagen*** > > Department of Geoscience and Natural Resource Management > > Forest and Landscape College > > Nødebovej 77a > > 3480 Fredensborg > > Denmark > > > > > > DIR +45 35331579 > > MOB +45 40115084 > > l...@ign.ku.dk <mailto:l...@ign.ku.dk> > > www.ign.ku.dk <http://www.ign.ku.dk/> > > > > > > cid:image001.gif@01D2444C.0C2DB110 > > > > > > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > J. Gustavo -- Jorge Gustavo Rocha Departamento de Informática Universidade do Minho 4710-057 Braga Tel: +351 253604480 Fax: +351 253604471 Móvel: +351 910333888 skype: nabocudnosor _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user