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

[Neumann, Andreas]

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). 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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