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I am working with two point layers in QGIS:

Red point layer: These points come from a CAD DXF export and contain mast numbers in the attribute field TxtString. They represent labels, not actual mast locations.

Gray points: These are the actual mast locations, but their attribute table lacks useful IDs or information.

I want to transfer the mast numbers (TxtString field) from the red points to the nearest gray point, creating a new field in the gray points layer to store this information. The linkage is based on proximity, as the layers don't share a common ID.

My setup:

Both layers are shapefiles. The task should identify the nearest red point to each gray point and copy the mast number (TxtString) into the gray point layer. Steps I've tried: I considered using a spatial join in QGIS, but I am unsure how to Ensure that only the nearest red point to each gray point is used. Create a new field in the gray points layer with the corresponding attribute value. Question: What is the best way to achieve this in QGIS? Are there specific tools or expressions?

red point holds the Info (Label - numbers) für the grey points closest to themstrong text

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    Does "Join attributes by nearest" solve your problem? Commented Jan 15 at 9:45
  • Do not know if this a duplicate of this. Commented Jan 15 at 9:48

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Use join by nearest with the correct locations as your first input, and the "data-points" as your second input. Allow only 1 nearest neighbour and if you feel uncertain, add a maximum join distance.

For single powerlines this will work well, in the case of several parallel lines, or junctions, you might have to put in some manual work.

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