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I am trying to add a ring in a feature in a shapefile. This feature is a single part feature but has already a few rings. When I try to add the new ring, I have the error message : "The inserted Ring is not contained in a feature". I tried to modify my snapping options thinking that the problem came from this setting, but I didn't have any luck.

Does anybody know how I can fix this problem?

I use QGis 1.8.0-Lisboa and Windows 7.

Thanks

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are creating a inner ring or deleting from a single part polygon? –  Mapperz Jan 28 '13 at 21:19
    
I am creating an inner ring –  Bap Jan 28 '13 at 21:53
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1 Answer

up vote 1 down vote accepted

When adding a new ring, if the ring outline intersect any of the existing rings, you would get that error message. Here i tried to create the red ring, but it is intersecting an existing ring. Also check if there are any unwanted snapping to edges setup.

enter image description here

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