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In QGIS I am trying to run a buffer on a polygon layer for 100 meters, it is based on a tutorial so it is supposed to work but it doesn't work. Someone in another forum suggested that I merge the polygons first but it actually didn't make a buffer at all after that.

I am using WGS84 UTM Zone 33S, the tutorial link is here http://docs.qgis.org/2.14/en/docs/training_manual/answers/answers.html#complete-analysis-2

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  • What is the projection system of your layer? If you want the buffers in meters then the layer should be in a projection system with meters as units. Also can you share the tutorial or the steps you followed?
    – nash
    Commented Mar 3, 2017 at 16:38
  • is this question relevant? gis.stackexchange.com/questions/228951/…
    – Ian Turton
    Commented Mar 3, 2017 at 16:48
  • the problem is solved here : gis.stackexchange.com/questions/230736/…
    – Janita
    Commented Mar 6, 2017 at 9:36
  • Janita, it didn't work on mine.
    – L Utterback
    Commented Mar 6, 2017 at 15:17
  • I reinstalled QGIS and got it to work after using your example.
    – L Utterback
    Commented Mar 6, 2017 at 21:05

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I was just having a similar issue. My polygon was in NAD 83 UTM coordinates and I set my buffer distance up in meters and the resulting buffer was always blank. I think my issue was that the nodes on my polygon crossed. Check your nodes that you have clear uniform polygons without any nodes intersecting. Hope this helps.

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