Hi Randal,<div>I had noticed the polygons to points converter, but wanted to do it "properly" - i.e. with a polygons in polygons comparison.</div><div><br></div><div>Your method will likely work but adds two extra steps (conversion to points and then from points back to polygons). Does QGIS not have a tool for this then?</div>
<div><br></div><div>Thanks!</div><div><br></div><div>Jonathan<br>
<br><br><div class="gmail_quote">On 8 August 2013 13:12, Randal Hale <span dir="ltr"><<a href="mailto:rjhale@northrivergeographic.com" target="_blank">rjhale@northrivergeographic.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Here's how I would do it: You have Two
polygon layers and you need to count the number of polygons in
layer 1 that are contained in the polygons in layer 2 <br>
<br>
1. Convert the polygons in 1 to points: Vector -> geometry
-> polygon centroids <br>
2. then use -> vector -> analysis tools -> points in
polygon. Count the number of points contained by polygons in layer
2. <br>
<br>
Hope that helps or at least creates an idea. <br>
Randy<br>
<pre cols="72">-----------------
Randal Hale, GISP
North River Geographic Systems, Inc
<a href="http://www.northrivergeographic.com" target="_blank">http://www.northrivergeographic.com</a>
<a href="tel:423.653.3611" value="+14236533611" target="_blank">423.653.3611</a> <a href="mailto:rjhale@northrivergeographic.com" target="_blank">rjhale@northrivergeographic.com</a>
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</pre><div><div class="h5">
On 08/08/2013 07:36 AM, Jonathan Moules wrote:<br>
</div></div></div>
<blockquote type="cite"><div><div class="h5">Hi List,
<div> I have two layers of polygons. I want to do some analysis
between them, basically doing a spatial join, counting how many
of one polygon layer there are intersecting with each polygon in
the other layer.
</div>
<div>ArcGIS does this easily with the "Spatial Join" tool
(ArcToolbox version). How can I do this in QGIS?</div>
<div><br>
</div>
<div>I know there is Vector -> Data Manage Tools -> Join
attributes by location, but that only acts as a basic join and
doesn't allow for counting of the number of joins.</div>
<div><br>
</div>
<div>Sextante has a large collection of tools, but none of them
seem to have any help so I don't know what any of them do. (And
none of them seem applicable anyway).</div>
<div><br>
</div>
<div>Suggestions welcome, Cheers,</div>
<div>Jonathan</div>
<br>
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