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I have a lot of inward-pointing needles in my polygon layer (as shown in the screenshots below).

It is a not a multipart layer, so only one geometry and I would like to clean/delete those needles. Is there a tool for it? I tried dissolve, but this didn't change anything.

inner-pointing needles

inner-pointing needles edit mode

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There are several options to try. possibly all these yield a reasonable result, but sometimes one needs to be more creative.

Basic options:

  1. buffer the layer by a very tiny amount (for example 0.01 meter), then dissolve

  2. use v.clean the bleacher ;) of all artifacts. You will have to play with some of its options among the ones under Cleaning tools. Judging from your screenshots I would start by selecting rmbridge, rmdangle, or rmline

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    Yeah, great! Or buffer by 0.01 (or: diameter of the needles) and then again with-0.01 to get the orgininal shape back.
    – Babel
    Sep 6 at 13:11
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    Thank you! v.clean didn't work out, but buffer with a tiny distance is a great way and solves my problem!
    – John
    Sep 6 at 14:35

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