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My problem is that I have a buffer with a 800m diameter but need to have a 1km diameter.

I don't have the line-feature on which the buffer was created ... so I want to recreate the line by doing the buffer-calculation the other way round. I haven't found sth yet so I thought someone might had a similar issue in the past and knows how to create the line with which my buffer was created or has an other solution. I was trying to Buffer the Buffer by adding 100m but that is not possible.

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    Just buffer the buffer by another 100m. Can you explain why it is not possible?
    – geozelot
    Commented Nov 18, 2022 at 11:27
  • Cause I'm an idiot. The data was in KML and I just imported it into my project. Then I merged the different buffer layers and stopped thinking. I had to safe the merged buffers (and dissolve them) as an ESRI Shape with a matching coordinate system and now it works. Anysways I'm still wondering, if it is possible to do the buffer-calculation the other way round? And thanks for responding so quickly!
    – Max
    Commented Nov 18, 2022 at 11:46
  • In theory the reverse operation is rather trivial. In practice it is a little convoluted if you have to work with higher-level functionality.
    – geozelot
    Commented Nov 18, 2022 at 12:21
  • Can something like this work? gis.stackexchange.com/questions/33887/…
    – Bera
    Commented Nov 18, 2022 at 12:48
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    Yes, that can work :) Thanks for that.
    – Max
    Commented Nov 18, 2022 at 13:51

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