In QGIS, I have a layer of numerous vector lines that need to be buffered. Once they've been buffered, I'd like to have those polygons split into two, with the original line being the segment that splits them. This also needs to be done with a vector layer that has roughly 10,000 lines in it, so I won't be able to complete this line by line.

The first picture simply shows what the layer of lines looks like. The second picture shows how I'd like to be able to identify specific parts of the buffers after they've been buffered.

Lines prior to getting buffered.

Lines get buffered, then those buffers need to be split.

1 Answer 1



Tool options:

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Two results:
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  • Where do I find the Single Sided Buffer tool? Using QGIS 3.12 Jan 31 at 21:06
  • It's in the Vector Geometry group in 3.28. Type buffer in your processing search box to see if it comes up.
    – John
    Jan 31 at 21:25
  • 1
    It should be in Processing Toolbox (Ctrl+Alt+T) > Vector Geometry. Jan 31 at 21:41

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