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<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Some progresses, the following little code does what I need for the first band (i.e. day) I think:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">import qgis.analysis<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">vectorlayer=qgis.utils.iface.mapCanvas().layer(0)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">rasterfile = qgis.utils.iface.mapCanvas().layer(1).source()<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">zonalstats = qgis.analysis.QgsZonalStatistics(vectorlayer,rasterfile,str(1))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">zonalstats.calculateStatistics(None)
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">I would like know to loop over the 11117 days with something like:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Day=range(1,11117,1)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">for i in Day:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">My question is hence: how do I access the other bands?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">This doesn’t work for instance: rasterfile = qgis.utils.iface.mapCanvas().layer(data@1).source()<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">All the best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH" style="color:#1F497D">Xav <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH" style="color:#1F497D"> <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR-CH">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR-CH"> qgis-user-bounces@lists.osgeo.org
[mailto:qgis-user-bounces@lists.osgeo.org] <b>On Behalf Of </b>Xavier Vollenweider<br>
<b>Sent:</b> vendredi 9 août 2013 14:18<br>
<b>To:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> [Qgis-user] zonal statistics with multiple bands raster<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dear all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I would like to compute zonal statistics from a raster file with multiple bands (11’117 actually). The raster file (.cdf) contains daily rainfall for Kenya from 1983 to present. I need to get the average rainfall for
each county.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I know how to do it manually for each band, but doing it on the 11’117 bands is clearly not option...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Could you provide me with a way to automatize it via the python console?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Ideally, I would like the end result should be a shape file with the 11’117 attributes that I will eventually save as a .csv. The goal is to build a panel dataset that I will use in R or Stata.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">All the best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Xav <o:p></o:p></span></p>
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