I'm pretty new to QGIS and geoprocessing. I have a layer of points representing traffic lights - where each point is a different feature: Traffic lights layer

I wish to create a layer with traffic light junctions based on this layer. My approach is to create buffer around each point - which I've done using QGIS: Buffered points

But then, when I try yo dissolve them into single shapes, QGIS creates one feature for all the shapes instead of a feature per junction: Dissolved shapes - all on a single feature

How can I tell QGIS to create a feature per junction?

  • You can either dissolve on a "junction ID", or dissolve all polygons into 1 then change the layer from multi-part to single part
    – JGH
    Apr 14, 2019 at 12:09
  • 2
    On a side note, the buffer seems to have been created using lat-longs, resulting in the ellipse shape. Since a degree of longitude has not the same ground length, in meters, as a degree of latitude, it is best to use a projected coordinate system before working with distances
    – JGH
    Apr 14, 2019 at 12:12
  • Thank you! Multipoint to single point did the job. You comment about distances is correct, but I'm still experimenting with the capabilities before diving into the projected coordinate system.
    – Shakedk
    Apr 14, 2019 at 12:52


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