[Qgis-user] Collecting Events

[pcreso at pcreso.com]

Hi Jim,

I don't think you can do quite the same thing... but you can achieve a comparable result. 

I generate a dataset which has the location & number of events there, then use the symbology tool to scale the symbol by the count, & optionally use the count as the label. 

I manage virtually all my data in Postgis, & do most of that sort of aggregation & data manipulation in the database. QGIS tends to be more the visualisation tool.

HTH,

   Brent Wood

--- On Tue, 3/20/12, Jim(tm) <lookitsjames at hotmail.com> wrote:

From: Jim(tm) <lookitsjames at hotmail.com>
Subject: [Qgis-user] Collecting Events
To: qgis-user at lists.osgeo.org
Date: Tuesday, March 20, 2012, 5:52 AM

Greetings, all!

I am attempting to create size-graduated point markers for burglary data
based on the number of burglaries per address.  With Arc, one would use the
Collect Events tool to combine multiple points into a single weighted point
- eg, from 5 points representing burglaries at one address you would get one
point with the weighted value of 5.  How is this done in QGIS?


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