[Qgis-user] scale dependent point clustering (for visualization only)

[Brad Nesom]

something similar to this?
http://help.arcgis.com/en/webapi/flex/samples/index.html?sample=FeatureLayerClustering
I don't mean for the post to irritate. It is such an elegant solution
(although a web solution)  I just had to show it.
Maybe someone can work some magic in qgis.



On Fri, May 27, 2011 at 6:09 AM, Andreas Neumann <a.neumann at carto.net>wrote:

> No, the point displacement render is almost the opposite to clustering. It
> explodes feature that are stacked on top of each other so one can see that
> there are several features at the same place with potentially different
> symbolization.
>
> A cluster renderer would be a valuable addition to QGIS as a separate
> renderer. If your data resides in Postgis, you can also use Postgis and a
> view if you need clustering. I once did this for a report information
> system. You can round the coordinates and group/aggregate them and then
> average by its original coordinates so that the cluster position is at the
> weighted coordinate of all input point geometries. It is not very hard to do
> in Postgis.
>
> Andreas
>
>
> On Fri, 27 May 2011 11:50:07 +0200, Anita Graser wrote:
>
>> Isn't that what Point Displacement Renderer does?
>>
>> Best wishes,
>>
>> Anita
>>
>> On Fri, May 27, 2011 at 10:59 AM, Giovanni Manghi  wrote:
>>
>>  seems a nive idea for a plugin.
>>>
>>> Cheers
>>>
>>> -- Giovanni --
>>>
>>> On Fri, 2011-05-27 at 16:57 +0800, maning sambale wrote:
>>> > I'm looking for ways to create simple visualization of point
>>> clusters
>>> > (in QGIS of course) similar to the openlayers cluster strategy:
>>> > http://openlayers.org/dev/examples/strategy-cluster.html [1]
>>>
>>> > The purpose is simply for visualization and can be configured by
>>> map scale.
>>> >
>>>
>>> _______________________________________________
>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org [2]
>>> http://lists.osgeo.org/mailman/listinfo/qgis-user [3]
>>>
>>
>>
>>
>> Links:
>> ------
>> [1] http://openlayers.org/dev/examples/strategy-cluster.html
>> [2] mailto:Qgis-user at lists.osgeo.org
>> [3] http://lists.osgeo.org/mailman/listinfo/qgis-user
>> [4] mailto:giovanni.manghi at gmail.com
>>
>
> --
> --
> Andreas Neumann
> Böschacherstrasse 10A
> 8624 Grüt (Gossau ZH)
> Switzerland
>
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