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So I've been trying to make a master cost raster (taking into account the slope and landcover data). However I can't make the r.mapcalculator work... I tried with r.mapcalc but the interface looks so different from the tutorial I'm using (http://gracilis.carleton.ca/CUOSGwiki/index.php/Evaluating_Landscape_Permeability_in_Quantum) and I ended up not being able to perform the analysis.enter image description here

I also can't use any of the functions from the "GRASS commands" tab (even though the tab GRASS GIS 7 works fine. I tried installing QGIS over again, taking a look at the directory GRASS is installed and nothing seems to work.

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  • Can you tell us what operating system you are on and your method/source for installation and the version of QGIS.
    – MappaGnosis
    Commented Nov 16, 2017 at 7:48
  • I use OS X El Capitan 10.11.6. The QGIS version is 2.18. I've got everything from kyngchaos.com. Maybe I messed up with the python modules or something like this?
    – Guilherme Salles
    Commented Nov 16, 2017 at 8:07
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    If it was a Python issue I'd expect an error about GDAL when starting QGIS. Also - have you seen this thread
    – MappaGnosis
    Commented Nov 16, 2017 at 8:55
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    Well, the r.mapcalculator script may not be present in your GRASS GIS version. BTW: There is an open ticket to re-introduce the script again: trac.osgeo.org/grass/ticket/3431
    – markusN
    Commented Nov 16, 2017 at 21:40
  • Oh, I see. So what tool would you recommend for someone that wants to combine the cost of different rasters?
    – Guilherme Salles
    Commented Nov 17, 2017 at 0:45

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