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I have two layers of points:

  • The first layer contains points which have an attribute called "svf" with values between 0 and 1
  • The second layer contains a subset (in terms of location) of the points in the first layer

The green points are from the first layer, the big blue ones are from the second layer:

enter image description here

What I want to do now is to set the "svf" value to 0 for all points in the first layer, who have a corresponding point in the second layer.

I tried it using the "Join attributes by location" tool, but I couldn't get it to work the way I wanted it to.

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  • "Select by location" followed by "Field calculator"
    – Albert
    Nov 10, 2021 at 15:19
  • @MrXsquared they are probably a little apart, because both layers were derived from different polylines with 'Generate points (pixel centroids) along line'
    – Martin
    Nov 10, 2021 at 15:21

1 Answer 1

7

You can select the nearby points using "Select by expression", then you can open the calculator to update the desired field.

The expression would make use of overlay_nearest() to find points having a nearby point in the 2nd layer. You must specify a maximal acceptable distance between the points (beware of the coordinate system unit)

overlay_nearest('layer_2_name', max_distance:=0.1)

enter image description here

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