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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hei Antonello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Have a look at r.univar (<a href="https://grass.osgeo.org/grass70/manuals/r.univar.html">https://grass.osgeo.org/grass70/manuals/r.univar.html</a>)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">And the zone option.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Stefan<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> grass-user [mailto:grass-user-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Antonello Lobianco<br>
<b>Sent:</b> 19. september 2016 18:42<br>
<b>To:</b> grass-user <grass-user@lists.osgeo.org><br>
<b>Subject:</b> [GRASS-user] How to print a table with the values of a given raster layer aggregated by a second raster layer ?<o:p></o:p></span></p>
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<p>Let's say in grass I have a raster layer "regionId" and a raster layer "forestArea".<o:p></o:p></p>
<p>In the regionId I have stored the ids of the regions, in the forestArea I stored the square km of forest within the pixel.<o:p></o:p></p>
<p>How can I print a table summing up the forest area by region, that is the sum of the values of a layer aggregated ("group by") by a second layer ?<o:p></o:p></p>
<p><o:p> </o:p></p>
<p>Cheers,<o:p></o:p></p>
<p> Antonello<o:p></o:p></p>
<p><o:p> </o:p></p>
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<p class="MsoNormal">Antonello Lobianco<br>
AgroParisTech, Laboratoire d'Economie Forestière<br>
14 Rue Girardet - 54000 Nancy, France<br>
Tel: +33.383396865<br>
Email: <a href="mailto:antonello.lobianco@nancy.inra.fr" target="_blank">antonello.lobianco@nancy.inra.fr</a><br>
<a href="http://antonello.lobianco.org/" target="_blank">http://antonello.lobianco.org</a><o:p></o:p></p>
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