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I want to create a map of origins and destinations as a bubble map.

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As you can see on the above image (green: origins, red: destinations). I have applied rule based symbology with expression on symbol size in the same layer. However, some red green bubble information being lost when I try to do that due to rendering order. I want to always render the bubble with bigger value so that they will both appear on the map. Is there a way to do that with rule based symbology? If not what is the proper way to do that?

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  • Are those points of origin/destination in one layer or they are two different?
    – Taras ♦
    Commented May 3, 2021 at 10:08
  • they are in one layer
    – meteergen
    Commented May 3, 2021 at 10:18

1 Answer 1

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In rule based symbology, rules are applied in order.

You can draw the origin first, then the destination, and, again, re-draw the origin only if it is smaller than the destination (copy/paste the 1st rule and apply a condition)

enter image description here

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    I was easier than I though ... you are genius
    – Taras ♦
    Commented May 3, 2021 at 13:58
  • it is far from perfect though, because any change to the 1st rule must be replicated to the last rule
    – JGH
    Commented May 3, 2021 at 14:00
  • Yes, but still this is the first working solution till now
    – Taras ♦
    Commented May 3, 2021 at 14:00
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    To limit duplication I would also filter the first rule with origin >= destination so that each feature is only drawn once.
    – MarHoff
    Commented May 3, 2021 at 14:34
  • "Any change to the 1st rule must be replicated to the last rule": a workaround could be to use (custom) variables for style and filter settings that are used bot an 1st an last rule
    – Babel
    Commented May 4, 2021 at 13:47

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