[Qgis-user] Can the point displacement center symbol be scaled based on number of corresponding points?

[Anita Graser]

On Nov 12, 2015 9:11 AM, "Neumann, Andreas" <a.neumann at carto.net> wrote:
>
> I also think that - what Anita wants - is a special case of a cluster
renderer (one that actually does not cluster, but only count how many
features are at the same geometry). To have this as a special option of the
displacement renderer would be a quite misleading ...
>
> But the cluster renderer also allows for a search radius (similar to the
heatmap) - while the displacement renderer only looks at features at the
exact same location (I know there is now a tolerance, but this was only
added later).

Exactly this tolerance makes the renderer much more interesting to me.
Never had a use case for the original displacement renderer.

Best wishes
Anita



The displacement renderer was originally designed to show people who live
at the very same address.
>
> I'd also be interested to see such a cluster renderer - actually since a
couple of years - but it was never that important to my employer that we
invested in it.
>
> Andreas
>
> On 2015-11-11 22:03, Anita Graser wrote:
>>
>>
>>
>> On Wed, Nov 11, 2015 at 9:46 PM, Nyall Dawson <nyall.dawson at gmail.com>
wrote:
>>>
>>>
>>> On 12 Nov 2015 7:30 AM, "Anita Graser" <anitagraser at gmx.at> wrote:
>>> >
>>> >
>>> >
>>> > On Wed, Nov 11, 2015 at 9:09 PM, Nyall Dawson <nyall.dawson at gmail.com>
wrote:
>>> >>
>>> >>
>>> >> On 12 Nov 2015 6:51 AM, "Anita Graser" <anitagraser at gmx.at> wrote:
>>> >> >
>>> >> > Hi,
>>> >> >
>>> >> > Is there a way, maybe a function for expression based styles,
which makes it possible to scale the center symbol of the point
displacement style based on the number of corresponding points?
>>> >> >
>>> >> > So if 5 points are summarized with one center symbol, make it 5
big and/or label it with "5".
>>> >>
>>> >> Do you also want the ring sizes to change? Or are they constant?
>>> >
>>> > ​Actually, I don't want the ring at all. I'm just looking to
reproduce
http://suite.opengeo.org/opengeo-docs/cartography/rt/pointstacker.html
>>>
>>> Ah, now I understand. Not possible at the moment, but the displacement
renderer could be extended to allow this style (and be renamed
"displacement/stacker"). Let me think on this - I might launch a crowdfund
to add this feature.
>>
>> ​Great, looking forward to seeing what you come up with :)
>>
>> Best wishes,
>> ​Anita
>>
>> ​
>>
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>
>
>
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