<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Hi Joris,<br>
<br>
have a look at this post here, its what you need to do:<br>
<br>
<a class="moz-txt-link-freetext" href="http://linfiniti.com/2013/04/dynamically-updating-layers-in-qgis-with-postgis-views/" target="_top" rel="nofollow" link="external">http://linfiniti.com/2013/04/dynamically-updating-layers-in-qgis-with-postgis-views/</a><br>
<br>
Basically you can accomplish that by importing your point layer to a
Postgis database (using th SPIT plugin in QGIS) and then create a
view of your point layer that creates the buffer around the point.
Here an example of how you could create that view via SQL:<br>
<br>
create view point_buffer as<br>
select gid,st_buffer(the_geom,buffer) as geom <br>
from points<br>
<br>
"buffer" would be the column with the value for your buffer. If you
load the point and the view back into QGIS it will dynamically
create the buffer around your point according to the "buffer" value,
wherever you move that point.<br>
<br>
Installing instructions for Postgis:<br>
<br>
<a class="moz-txt-link-freetext" href="http://postgis.net/install" target="_top" rel="nofollow" link="external">http://postgis.net/install</a><br>
or<br>
<a class="moz-txt-link-freetext" href="http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgis_tut01" target="_top" rel="nofollow" link="external">http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgis_tut01</a><br>
<br>
<br>
Stefan<br>
<br>
<div class="moz-cite-prefix">On 06/17/2014 09:14 PM, jorishin [via
OSGeo.org] wrote:<br>
</div>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em'
cite="mid:3D86D8D47CACA64ABD1FED3ECC895313013E994462@GL01.AirEnergy.local"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">Hello, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Is there a way to do the
following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a point layer. I
create a buffer layer around these points.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Problem: How do I move
the buffer together if I want to move the point?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for any tips<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;mso-fareast-language:NL-BE"
lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><a moz-do-not-send="true" name="OLE_LINK1"
target="_top" rel="nofollow" link="external"><span
style="mso-fareast-language:NL-BE">Joris
<b>HINTJENS</b></span></a><span
style="font-size:12.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
_______________________________________________
<br>
Qgis-user mailing list
<br>
<a moz-do-not-send="true"
href="/user/SendEmail.jtp?type=node&node=5146303&i=0"
target="_top" rel="nofollow" link="external">[hidden email]</a>
<br>
<a moz-do-not-send="true"
href="http://lists.osgeo.org/mailman/listinfo/qgis-user"
target="_top" rel="nofollow" link="external">http://lists.osgeo.org/mailman/listinfo/qgis-user</a>
<br>
<br>
<hr color="#cccccc" noshade="noshade" size="1">
<div style="color:#444; font: 12px
tahoma,geneva,helvetica,arial,sans-serif;">
<div style="font-weight:bold">If you reply to this email, your
message will be added to the discussion below:</div>
<a moz-do-not-send="true"
href="http://osgeo-org.1560.x6.nabble.com/Move-Point-with-buffer-tp5146303.html" target="_top" rel="nofollow" link="external">http://osgeo-org.1560.x6.nabble.com/Move-Point-with-buffer-tp5146303.html</a>
</div>
<div style="color:#666; font: 11px
tahoma,geneva,helvetica,arial,sans-serif;margin-top:.4em;line-height:1.5em">
To unsubscribe from Quantum GIS - User, <a
moz-do-not-send="true"
href="" target="_top" rel="nofollow" link="external">click
here</a>.<br>
<a moz-do-not-send="true"
href="http://osgeo-org.1560.x6.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml" rel="nofollow" style="font:9px serif" target="_top" link="external">NAML</a> </div>
</blockquote>
<br>
<br/><hr align="left" width="300" />
View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/Move-Point-with-buffer-tp5146303p5146410.html">Re: Move Point with buffer</a><br/>
Sent from the <a href="http://osgeo-org.1560.x6.nabble.com/Quantum-GIS-User-f4125267.html">Quantum GIS - User mailing list archive</a> at Nabble.com.<br/>