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I have two line layers. The features of both are touching each. Now I would like to label one of the line layers with the attributes of the touching layer.

The case: In the one layer are drain's (green) and in the other one are cables (red). The cables are inside the drain (digitized with snapping to the drains). Now I need the drain-id (green labels) labeled on every cable.

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I have to use shape files! So I thought to use the aggregate function of QGIS...

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    If you're going to publish this map, please choose a different color scheme. Red + lime green is a combination that appears to vibrate on the screen. It will give most users of your map a headache, and anyone with red-green colorblindness won't be able to read it at all.
    – csk
    Apr 29, 2019 at 17:10
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    In your screenshot, the lime color object looks like a generic, i.e. as one map object, then where does it come from different green signatures?
    – Cyril Mikhalchenko
    Apr 30, 2019 at 6:24
  • I used symbol levels... And I will choose other color combination next time!
    – MartinMap
    May 2, 2019 at 14:43

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You can use RefFunctions Plugin together with this expression:

 geomintersects('drain','drainid')

'drain' is the targetlayername and 'drainid' the targetfieldname you want to get.

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