<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
If every Accident has an ID for location you can use the group stats
plugin to summarize the # of wrecks in each location. You could then
save that out to a text file and join it to a point layer and get
the graduated symbol you are after.<br>
<br>
If not - I'm thinking you set a very small buffer in each location
and then use the Points in Polygon tool under vector -> analysis
(I think). <br>
<br>
Good Luck, We're all counting on you! <br>
<br>
Randy<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 09/29/2015 09:38 PM, Johanna Botman
wrote:<br>
</div>
<blockquote
cite="mid:OF4F34B09A.A7693B64-ONCA257ED0.00087BEC-CA257ED0.000907ED@griffith.nsw.gov.au"
type="cite">
<p><font face="sans-serif" size="2">Hi,</font><br>
<br>
<font face="sans-serif" size="2">I'm having trouble working out
what should be a simple problem.</font><br>
<br>
<font face="sans-serif" size="2">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.</font><br>
<br>
<font face="sans-serif" size="2">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.</font><br>
<br>
<font face="sans-serif" size="2">My brain hurts and I can't
think how to do this. Can someone help?</font><br>
<br>
<font face="sans-serif" size="2">_______________<br>
Johanna Botman<br>
GIS / Assets Officer</font>
</p>
<p> </p>
<p><font face="Arial" size="2"> </font></p>
<font face="Arial" size="2">
<p>
</p>
<hr>
This e-mail, together with any attachments, is for the exclusive
and confidential use of the addressee(s). Confidentiality is not
waived if you are not the intended recipient. Any other
distribution, use of, or reproduction without prior written
consent is strictly prohibited. </font>
<p><font face="Arial" size="2">Views expressed in this e-mail are
those of the individual, except where specifically stated
otherwise. If this e-mail has been sent to you in error,
please delete the e-mail completely and immediately from your
system. Although reasonable precautions are taken, Griffith
City Council does not warrant or guarantee this message to be
free of errors, interference, viruses or similar malicious
code and does not accept liability for any consequences to the
recipient opening or using this email or attachments.</font></p>
<p><font face="Arial"><font size="2">This email was scanned and
cleared by MailMarshal, Sophos & Kaspersky AV<br>
</font></font></p>
<hr><font face="Arial"><font size="2">
</font></font>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Qgis-user mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a></pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
-----------------
Randal Hale
North River Geographic Systems, Inc
<a class="moz-txt-link-freetext" href="http://www.northrivergeographic.com">http://www.northrivergeographic.com</a>
423.653.3611 <a class="moz-txt-link-abbreviated" href="mailto:rjhale@northrivergeographic.com">rjhale@northrivergeographic.com</a>
twitter:rjhale <a class="moz-txt-link-freetext" href="http://about.me/rjhale">http://about.me/rjhale</a>
<a class="moz-txt-link-freetext" href="http://www.northrivergeographic.com/introduction-to-quantum-gis">http://www.northrivergeographic.com/introduction-to-quantum-gis</a>
Southeast OSGEO: <a class="moz-txt-link-freetext" href="http://wiki.osgeo.org/wiki/Southeast_US">http://wiki.osgeo.org/wiki/Southeast_US</a></pre>
</body>
</html>