<p dir="ltr">Hi,<br>
I am not sure you can use max value in QGIS raster calculator. (Please correct me if I am wrong).</p>
<p dir="ltr">I think you can do it with gdal calc.py. and most likely in Grass or Saga using the processing plugin.</p>
<p dir="ltr">http://gis.stackexchange.com/questions/107257/combine-overlapping-rasters-in-gdal-calc-py-taking-the-maximum-value-from-each</p>
<p dir="ltr">If you want more flexibility but don't mind the lost of speed, you could convert the raster in a vector format and use the field calculator to do it. This work's OK up to a few million points or pixels. After that, it's very slow. You can speed things up by using R for the statistics.</p>
<p dir="ltr">I think there is a raster to point module in the QGIS processing plugin or just look at this: </p>
<p dir="ltr">http://fr.slideshare.net/shencoop/qgis-raster-to-point </p>
<p dir="ltr">Then you could do the reverse operation on the results.<br></p>
<p dir="ltr">Nicolas Cadieux M.Sc.<br>
Les Entreprises Archéotec inc. <br>
8548, rue Saint-Denis Montréal H2P 2H2<br>
Téléphone: 514.381.5112 Fax: 514.381.4995<br>
www.archeotec.ca</p>
<div class="gmail_quote">On Jul 7, 2015 8:06 AM, "Giacomo Fontanelli-2 [via OSGeo.org] " <<a href="/user/SendEmail.jtp?type=node&node=5214684&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br type='attribution'><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div>dear community</div><div><br /></div><div>I have a stack (bsq) of 5 images.</div><div><br /></div><div>I would like to make an aggregate map of the maximum of each pixel of the bands.</div><div><br /></div><div>I Googled and I found contrasting opinions on how to do it.</div><div><br /></div><div>Can you help me?</div><div><br /></div><div>Thank you</div></div>
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