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<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">Hi mailing list
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">I have a query re: Grass with which I hope you are able to assist (v.6.4.3 as standard installation with Qgis 2.2.20 Valmiera).
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">I would like to calculate volume from an upper and lower DEM (surfaces) but this is not working.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">I have used both the Qgis interface and the grass GUI (6.4.3) to try and achieve this. Qgis interface is good but restrictive when applying extras and additions (–p/-r/-o). The
GRASS GUI (6.4.3 and 7) is also fantastic but seems to lose projection along the way.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">I would have thought it would be as practical[?] as:
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">The sum of all pixels/grid components (DEM-upper minus DEM-lower *surface area per pixel) OR sum of (voxel volume from lower-DEM to upper-DEM)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">To the voxel end I see that the 3-D voxel data processing is not included in 6.* but is in Grass 7 (daily build version).
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">So, if there are no r3.* capabilities in Grass 6.4.3; which commands would one use as a substitute? Would this even apply in the 6.*-series?
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">Request may be a bit premature but would anyone know of a suitable website (or series thereof) that details the progression from 2-D to 3-D and then into NVIZ iro tutorials/videos?
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">(I have already seen the GRASS GIS series on YouTube.)
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<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">Thanks
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-ZA" style="font-size:10.0pt;mso-fareast-language:EN-GB">Regards<o:p></o:p></span></font></p>
<p class="MsoNormal"><b><font size="2" face="Calibri"><span lang="EN-ZA" style="font-size:10.0pt;mso-fareast-language:EN-GB;font-weight:bold">Vinnie
</span></font></b><span lang="EN-US" style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
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