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I would like to "Add Rings" but using other polygons. Example: https://www.dropbox.com/s/ue1k3b646ivqedo/holes.JPG

I would like to delete the two selected polygons and create holes under them in the big polygon where they are.

Is that possible?

Thanks!

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1 Answer

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you can save the "hole" polygons and the "base" polygons in two different, temporary shapefiles and then you use the symmetrical difference tool. You find it in vector>geoprocessing tools (if you are using a very old qgis version it is in the fTools plug-in). This create the shapefile that you are looking for. If you have already 2 shapefiles (bases and "hole"), just run the tool ;).

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great that works! thanks!! – Aitor Sep 26 '12 at 8:30
For temporary shapefiles, use Memory Layer Plugin – Willy Sep 26 '12 at 11:53
@Aitor good! (it will also be nice if you mark my answer as useful ;) ) – seba Sep 27 '12 at 12:10
@seba i cant since i dont reach 15 of reputation when i reach ill do it. thanks again for your help – Aitor Jan 31 at 11:24

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