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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">Hi Paulo and Helmut,<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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Did you consider using cStringIO, if you need a file-object?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">That would avoid the temporary file and thus should be more efficient too. See attached diff (it is probably not necessary
to remove the last line break though).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Just a suggestion.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Yet, there might be even more efficient solutions. For example raster2numpy from pygrass…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><a href="https://grass.osgeo.org/grass74/manuals/libpython/pygrass.raster.html#pygrass.raster.raster2numpy">https://grass.osgeo.org/grass74/manuals/libpython/pygrass.raster.html#pygrass.raster.raster2numpy</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Here however, you would have to mask NULL and I am not sure how to (platform-independent) determine values that represent
NULL in a raster map. This gives pointers but there are again issues with Windows it seems:
<a href="https://grasswiki.osgeo.org/wiki/GRASS_Python_Scripting_Library#Interfacing_with_NumPy">
https://grasswiki.osgeo.org/wiki/GRASS_Python_Scripting_Library#Interfacing_with_NumPy</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">And it leaves the question how to find out if a raster is Integer or not…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">With pygrass you could do:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">from grass.pygrass import raster as r<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">p = np.ma.masked_equal(r.raster2numpy(raster), np.nan)) # For floating point rasters on Linux<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">or<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">p = np.ma.masked_equal(r.raster2numpy(raster), -2147483648)) # For integer rasters<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hints from experienced Python/Numpy developers would be appreciated…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">That makes me wonder if it would be worth to add/collect recommendations for how to solve such common operations (like
e.g. parsing table output from grass commands) either e.g. here: <a href="https://trac.osgeo.org/grass/wiki/Submitting/Python">
https://trac.osgeo.org/grass/wiki/Submitting/Python</a> or here: <a href="https://grasswiki.osgeo.org/wiki/GRASS_and_Python">
https://grasswiki.osgeo.org/wiki/GRASS_and_Python</a> ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" 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-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" 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-GB" style="mso-fareast-language:EN-US"><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>Paulo van Breugel<br>
<b>Sent:</b> lørdag 3. februar 2018 09.14<br>
<b>To:</b> Helmut Kudrnovsky <hellik@web.de>; grass-user@lists.osgeo.org<br>
<b>Subject:</b> Re: [GRASS-user] Issue with addon r.vif in MS Windows GUI installations (stand-alone v. 7.2.2 and 7.0.5)<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<span style="font-family:"Arial",sans-serif;color:black">On February 2, 2018 8:52:03 PM Helmut Kudrnovsky <<a href="mailto:hellik@web.de">hellik@web.de</a>> wrote:<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:0cm">
<span style="font-family:"Arial",sans-serif;color:black">>>Any idea how I can do that in such a way that it works on both Linux and<br>
> Windows?<br>
><br>
> in r.vif script I've changed the relevant lines:<br>
><br>
> <----------------------------------------<br>
> # Get the raster values at sample points<br>
> fd, tmpcov = tempfile.mkstemp()<br>
> with open(tmpcov, "w") as text_file:<br>
> text_file.write(<br>
> gs.read_command("r.stats", flags="1n", input=raster,<br>
> quiet=True, separator="comma"))<br>
> p = np.loadtxt(tmpcov, skiprows=0, delimiter=",")<br>
><br>
> # Clean up<br>
> text_file.close()<br>
> os.close(fd)<br>
> os.remove(tmpcov)<br>
> if not n == "100%":<br>
> gs.run_command("r.mask", flags="r", quiet=True)<br>
> if exist_mask['fullname']:<br>
> gs.run_command("g.rename", raster=[mask_backup, "MASK"],<br>
> quiet=True)<br>
> return(p)<br>
> ----------------------------------------><br>
><br>
> and tested the script in winGRASS; it seems to work in windows; not tested<br>
> on linux and mac.<br>
><br>
><br>
Ok, thanks Helmut, I'll see if that works in Linux too<br>
><br>
> -----<br>
> best regards<br>
> Helmut<br>
> --<br>
> Sent from: <a href="http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html">
http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html</a><br>
> _______________________________________________<br>
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