[Qgis-user] Sum of field value within same cluster

[Alexandre Neto]

Hi Dario,

You don't need such complicated expression. There's a cluster variable that
returns the value for you. It's @cluster_value.

This is well documented here:

https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/vector_properties.html#point-cluster-renderer

Hope it helped.

Alexandre Neto
QGIS Support
www.qcooperative.net



A terça, 22/06/2021, 09:55, Dario C <dario955i at gmail.com> escreveu:

> Hi,
> I think I'm on the right way using this expression:
>
> aggregate('LayerID','sum',"FIELD",filter:=intersects(buffer($geometry,60),geometry(@parent)))
>
> [image: image.png]
> In point cluster I set 5 mm as distance (size of symbol is 4mm), so I
> thought that the buffer of my expression needed to be 5. Actually 5 does
> not work, so I changed to 5 multiply by the scale of the drawing
> (1/12.000), so I set 60.
> The point is that it works not so precise. In the screenshot you can see
> that, when you have two cluster close each other, the total sum is correct,
> but some parts are shifted to another cluster.
>
> Thanks for your help
>
>
>
> Il giorno dom 20 giu 2021 alle ore 15:15 Dario <dario955i at gmail.com> ha
> scritto:
>
>> Hi,
>> I’m working on a big scale, so I need to see my points using point
>> cluster.
>> I’d like to see as label the sum of a specific field of the point of the
>> same cluster.
>>
>> I started using aggregate expression and buffer intersection as filter,
>> but nothing good...
>>
>> Thank you in advance.
>>
>> Cheers mm
>>
>> _
>
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