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I would like to use the information from the Swedish SMHI related with their hydrological model elements (catchment areas) that have a Containment hierarchy structure, each element has the information about its dowstream element, to select or highlight a whole catchment area like in the picture below: enter image description here

The first step is to select them, but once that is done, of course there are other question.

Each element, among other data, has AROID (the ID of the element) and OMRID_NED (the ID of the element downstream).

I would like to do this in QGIS in a simple way, like a click in one element.

  • I think I might be wrong about Containment hierarchy because in this case one lement can be a subset of itself. If someone find the right definition, please ammend it. – Marco Oct 19 '18 at 15:06
  • I have just found a similar question, also without answer, but that seems similar to mine: gis.stackexchange.com/questions/263008/…. A difference is that I would like to look recursively upstrem, so everything is highlighed not only the elements inmediately upstream. – Marco May 8 at 20:40
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Looking at the data, my best guess would be you need to select by the Name e.g. 'Mynnar i Höje å' (a catchment I recognise). One would expect to see a common ID number somewhere but it appers they just use the name.

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