<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";
color:black;}
pre
{mso-style-priority:99;
mso-style-link:"Formateret HTML Tegn";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Markeringsbobletekst Tegn";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
color:black;
mso-fareast-language:EN-US;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;
mso-fareast-language:EN-US;}
span.MarkeringsbobletekstTegn
{mso-style-name:"Markeringsbobletekst Tegn";
mso-style-priority:99;
mso-style-link:Markeringsbobletekst;
font-family:"Tahoma","sans-serif";}
span.EmailStyle21
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.FormateretHTMLTegn
{mso-style-name:"Formateret HTML Tegn";
mso-style-priority:99;
mso-style-link:"Formateret HTML";
font-family:Consolas;
color:black;
mso-fareast-language:EN-US;}
span.EmailStyle24
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:3.0cm 2.0cm 3.0cm 2.0cm;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:790827441;
mso-list-type:hybrid;
mso-list-template-ids:-1969337998 -1660755130 134807555 134807557 134807553 134807555 134807557 134807553 134807555 134807557;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-font-family:Calibri;
mso-bidi-font-family:"Times New Roman";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[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]-->
</head>
<body bgcolor="white" lang="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">I think this solution sounds great but I’m afraid I’m much too green using QGIS to know how to do it. When downloading QGIS I got the GRASS GIS 6.4.3 GUI and command line as well but I have never used it and
don’t know how to. I don’t even know how to open the vector files in the GRASS program…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Is it possible to get a more precise description of what to do?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-CA" style="font-size:8.0pt;mso-fareast-language:EN-GB">Best regards<br>
<br>
</span><b><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Julie Houge Hansen</span></b><span lang="EN-CA" style="font-size:8.0pt;mso-fareast-language:EN-GB"><br>
PhD Student, Inst. of Chemical Eng., Biotechnology and Environmental Tech.</span><span lang="EN-CA" style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm"></td>
<td style="padding:0cm 0cm 0cm 0cm"></td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Tlf.</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="tel:+4565507212"><span style="color:black">+4565507212</span></a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Email</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="mailto:juhh@kbm.sdu.dk">juhh@kbm.sdu.dk</a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:8.0pt;mso-fareast-language:EN-GB">Addr.</span><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span lang="DE" style="font-size:7.5pt;mso-fareast-language:EN-GB">Niels Bohrs Allé 1, DK-5230 Odense M, Denmark</span><span lang="DA" style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;display:none;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="104%" style="width:104.86%">
<tbody>
<tr>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D;mso-fareast-language:EN-GB"><img border="0" width="309" height="44" id="_x0000_i1029" src="cid:image001.jpg@01D0B7EA.ECF083C0" alt="Description: C:\Users\CIC\Application Data\Microsoft\Signaturer\sduemaillogoUK.jpg"></span><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="color:#1F497D;mso-fareast-language:EN-GB">
<hr size="2" width="100%" align="center">
</span></div>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><b><span lang="DA" style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Campusvej 55 · 5230 Odense M · Tlf. 6550 1000 ·
</span></b><b><span lang="EN-CA" style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="https://webmail.sdu.dk/owa/redir.aspx?C=866ea63d2ed24495a0928ea339532b2a&URL=http%3a%2f%2fwww.sdu.dk%2f" target="_blank"><span lang="DA" style="color:black">www.sdu.dk</span></a></span></b><span lang="DA" style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="DA" style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="DA" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-GB">Fra:</span></b><span lang="DA" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-GB">
Micha Silver [mailto:micha@arava.co.il] <br>
<b>Sendt:</b> 3. juli 2015 15:27<br>
<b>Til:</b> Julie Houge Hansen; qgis-user@lists.osgeo.org<br>
<b>Emne:</b> Re: [Qgis-user] Vacuuming a vector polygon layer with a point layer in QGIS 2.8.2 (windows)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">I think you can solve this problem nicely by moving everything to rasters. There is the concept of a "cost" raster that totals how difficult it is to go from a certain start point to anywhere else in the region.
In your case, instead of total "difficulty" you would total potential biomass. You would create a raster showing the total biomass "collected" by starting at each biogas plant.<br>
<br>
This could be done with the GRASS module r.cost. See [1].<br>
Your polygon layer of biogas potential would be imported into GRASS, then converted to a raster (v.to.rast). You would also import the point layer of plants into GRASS as a point vector. Then run the module with the biogas potential as the input parameter,
and the plants as the "start_points". And you would set a value for the "max_cost" parameter which would be the maximum biomass any plants needs. Again, the output raster would represent the total amount of biomass accumulated when starting from any of the
plants.<br>
<br>
Hope that helps <br>
<br>
<br>
[1] <a href="http://grass.osgeo.org/grass70/manuals/r.cost.html">http://grass.osgeo.org/grass70/manuals/r.cost.html</a><o:p></o:p></p>
<div>
<p class="MsoNormal">On 07/03/2015 02:35 PM, Julie Houge Hansen wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Dear all<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I have tried asking my local QGIS expert but unfortunately she is for once not able to help me. I hope someone can.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I have a vector polygon layer that contains data for the amount of biogas potentially available in a polygon - unit is m3/ha/year. The polygons are of varying size.
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I have another vector point layer with data for the amount of biogas already produced on specific biogas plants – unit in m3/year.
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I would like to combine the two layers so that I “vacuum” the area surrounding the biogas plants for biogas potential. This will reveal where there are still areas with sufficient biomass available for a new biogas plant to be build.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I have no clue how to do this calculation but I think it should be possible. Can anyone help me out?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The overview I have of my data now looks like this: <o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><img border="0" width="478" height="441" id="Pladsholder_x0020_til_x0020_indhold_x0020_6" src="cid:image002.jpg@01D0B7EA.ECF083C0"></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The size of the shown point data is <b>independent</b> on the polygon layer. I would like it to be
<b>dependent</b> on the biogas potential available (in the polygon layer). I would like the size of the points to reflect how far you would have to drive (radius to the biogas plant) in order to get all the biomass needed to produce the biogas you intend to.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I am using QGIS version 2.8.2 64 bit with Windows. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-CA" style="font-size:8.0pt;mso-fareast-language:EN-GB">Best regards<br>
<br>
</span><b><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Julie Houge Hansen</span></b><span lang="EN-CA" style="font-size:8.0pt;mso-fareast-language:EN-GB"><br>
PhD Student, Inst. of Chemical Eng., Biotechnology and Environmental Tech.</span><o:p></o:p></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm"></td>
<td style="padding:0cm 0cm 0cm 0cm"></td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Tlf.</span><o:p></o:p></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="tel:+4565507212"><span style="color:black">+4565507212</span></a></span><o:p></o:p></p>
</td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Email</span><o:p></o:p></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="mailto:juhh@kbm.sdu.dk">juhh@kbm.sdu.dk</a></span><o:p></o:p></p>
</td>
</tr>
<tr>
<td width="40" style="width:30.0pt;padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:8.0pt;mso-fareast-language:EN-GB">Addr.</span><o:p></o:p></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span lang="DE" style="font-size:7.5pt;mso-fareast-language:EN-GB">Niels Bohrs Allé 1, DK-5230 Odense M, Denmark</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:12.0pt"> </span><o:p></o:p></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="104%" style="width:104.86%">
<tbody>
<tr>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:12.0pt"><img border="0" width="309" height="44" id="Billede_x0020_1" src="cid:image001.jpg@01D0B7EA.ECF083C0" alt="Description: C:\Users\CIC\Application
Data\Microsoft\Signaturer\sduemaillogoUK.jpg"></span><o:p></o:p></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="color:#1F497D;mso-fareast-language:EN-GB">
<hr size="2" width="100%" align="center">
</span></div>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><b><span lang="DA" style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB">Campusvej 55 · 5230 Odense M · Tlf. 6550 1000 ·
</span></b><b><span lang="EN-CA" style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-GB"><a href="https://webmail.sdu.dk/owa/redir.aspx?C=866ea63d2ed24495a0928ea339532b2a&URL=http%3a%2f%2fwww.sdu.dk%2f" target="_blank"><span lang="DA" style="color:black">www.sdu.dk</span></a></span></b><o:p></o:p></p>
<p class="MsoNormal"><span lang="DA"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="DA"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><br>
<br>
This mail was received via Mail-SeCure System.<br>
<br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Qgis-user mailing list<o:p></o:p></pre>
<pre><a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><o:p></o:p></pre>
<pre><a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><o:p></o:p></pre>
<pre>This mail was received via Mail-SeCure System.<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
</blockquote>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
</div>
</body>
</html>