Hi,
The easy way out is to do a cross tabulation in excel or libre office calc and
to then link both data bases together based on the point id. I think
there may also be a cross tabulation plugin in QGIS??? I would need to
look on a computer to make sure.
Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca
On Sep 29, 2015 21:47, "Johanna Botman-2 [via OSGeo.org] "
<ml-node+s1560n5226929...@n6.nabble.com> wrote:
Hi,
I'm having trouble working out what should be a simple problem.
I have data that lists all the traffic accidents in our local area. Each
accident has a unique ID, but there can be many accidents at the one location.
I want to show the accumulated accident numbers using a graduated symbol size
based on the count of accidents at that one spot. Underdark's excellent
blog post describes how to use the new features in QGIS 2.10 - using a range
from a single attribute. What I want QGIS to do is to add up the incidents for
a specific location.
My brain hurts and I can't think how to do this. Can someone help?
_______________
Johanna Botman
GIS / Assets Officer
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