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Split with Lines does not appear to be working for me in QGIS 3.24.

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My line and polygon are in the same CRS, you can see that they completely intersect but when I get the results, the polygon is unsplit (the layer has a single polygon).

A similar post at Split with lines not fully working using QGIS suggests dissolving, but this does not work.

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Not entirely sure what went wrong. The line was listed as one feature and was created in a continuous fashion. However, when I tried copying to the new scratch file, it pasted as 5 separate lines. I had tried dissolving my previous line without success. But when I dissolved these in my new shapefile and reperformed the split, it finally worked. So, I guess the issue was discontinuities hidden by a corrupted shapefile.

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  • Should I keep this post?
    – Alexander Audet
    Commented Jun 9, 2022 at 1:35
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    It’s your choice but personally I think deleting the answer and then the question might be appropriate.
    – PolyGeo ♦
    Commented Jun 9, 2022 at 1:54
  • @PolyGeo I don't see how deleting the answer and keeping the question would be appropriate since the answer gives my best approximation of what was wrong and a possible solution. On one hand, it might lead people with similar issues astray unless they have a similar corruption. On the other hand, perhaps my solution suggests a troubleshooting method for other users who can't snip due to hidden breaks in their line(s). I would have appreciated finding such an answer that would have got me troubleshooting in my situation. I now have another trick up my sleeve for future issues.
    – Alexander Audet
    Commented Jun 9, 2022 at 2:04
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    I suggested deleting both answer and question which I think may need to be done in that order.
    – PolyGeo ♦
    Commented Jun 9, 2022 at 2:13

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