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<p class="MsoNormal"><span lang="EN-GB">Dear GRASS-devs,<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 would like to extract statistics for vector geometries from a couple of maps derived from the same terrain model.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Unfortunately, v.rast.stats has two limitations for my use-case:
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo1"><![if !supportLists]><span lang="EN-GB"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">the rasterization has a significant overhead when called several times<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo1"><![if !supportLists]><span lang="EN-GB"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">only one percentile column can be produced (while I would like to get both 10 and 90% percentiles)<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">In order make v.rast.stats more efficient for use cases like mine, I would like to propose the following changes I could imagine:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-GB"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">add an optional input option for a raster map representing the category values of the vector map<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-GB"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">make column_prefix and raster option multiple<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-GB"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">add additional columns for additional percentiles<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">Since v.rast.stats is a Python script I could try to come up with a solution, if you generally agree that the proposed changes make sense and are not problematic…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">What do you think?<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">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Stefan<o:p></o:p></span></p>
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