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I'm a QGIS 1.8.0 user. I received broken shape file.

I found one feature which has a border line within polygon. I tried to delete line with tool;Merger, Dissolve, Node tool and etc.

I got the message that the geometry is invalid. Below message is result of geometry check. [ring 1 of polygon 0 not in exterior ring]

Any advice is welcome.

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If its broken, then go back to the originator and get a new copy - you might be able to make it valid, but that isn't going to make it correct, and there could be other errors that you aren't detecting. In general, for gis.SE, it helps if you can ask a specific question - you "question" doesn't actually ask anything, except advice, which makes it hard to provide an "answer". Please consider editing your question (just click "edit" above) to ask something specific, tell us more about the situation, and what else you've tried. –  BradHards May 19 '13 at 21:41
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