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I have a points geometry layer 'POINTS' with the field "ALTITUDE". And I have a polygon geometry layer 'POLYGONS' with the field "TERRITORY".

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I would need a labeling expression to label the points layer but only the highest value within or nearest to the polygons layer. Like this handmade screenshot capture:

enter image description here

1 Answer 1

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this can be done with the following expression for the label:

if ("ALTITUDE"=maximum(expression:="ALTITUDE", 
group_by:=overlay_intersects('POLYGONS',$geometry)),"ALTITUDE",'')  
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    I make a correction to your expression: if ("ALTITUDE"=maximum(expression:="ALTITUDE", group_by:=overlay_intersects('POLYGONS', "TERRITORY")), "ALTITUDE",'') I replace $geometry with "TERRITORY". Jan 15 at 10:16

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