3

I want to create an expression in the QGIS 3.28 dashboard layer that counts points on a specific point_layer and with a specific value that is displayed in the current map_extent view

aggregate(
   layer:='point_layer', 
   aggregate:='count', 
   expression:="field1", 
   filter:="field1"='3' AND within(.. ???.. )
   )
6
  • 1
    you can use the function from this post to get the current extent as a geometry
    – JGH
    Dec 3, 2023 at 14:49
  • i dont want to create virtual layer
    – Rii Pii
    Dec 3, 2023 at 17:35
  • 1
    you cans till create and use the function :)
    – JGH
    Dec 3, 2023 at 21:31
  • 2
    Please be aware you have a spelling mistake in your expression. whithin should be within.
    – Matt
    Dec 4, 2023 at 7:08
  • 1
    See this section of the documentation for how to define and use a custom function.
    – Matt
    Dec 4, 2023 at 7:28

1 Answer 1

3

The @map_extent variable returns the current extent:

aggregate(
   layer:='point_layer', 
   aggregate:='count', 
   expression:="field1", 
   filter:="field1"='3' AND within(@geometry, @map_extent)
   )
1
  • thank you webrian & Taras ... it is working well
    – Rii Pii
    Dec 5, 2023 at 10:49

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