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<div class="moz-cite-prefix">On 08/05/2019 16:10, Moritz Lennert
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:401afe34-532e-46dc-4f6a-c43f32436a26@club.worldonline.be">On
8/05/19 15:03, Francois Chartier wrote:
<br>
<blockquote type="cite">Hi Micha,
<br>
<br>
I have soil samples from boreholes where i have data points at
every meter interval and where soil type changes. i would like
to create a weighted average of soil property for lets say the
first 1 m below the DEM, so that i can evaluate potential for
infiltration across a watershed.
<br>
</blockquote>
<br>
You can use v.what.rast to read the DEM value into the attribute
table of your points. Then you can do whatever calculations you
need based on that.
<br>
<br>
Moritz
<br>
<br>
</blockquote>
<p><br>
</p>
<p>After Moritz's answer, It seems that your question is a data
aggregation problem. If we can see the actual structure of your
data (i.e. <tt>v.info -c</tt> or <tt>v.db.select</tt> then more
specific responses might be possible. Best would be a small subset
of the actual data.</p>
<p><br>
</p>
<p><br>
</p>
<blockquote type="cite"
cite="mid:401afe34-532e-46dc-4f6a-c43f32436a26@club.worldonline.be">
<blockquote type="cite">
<br>
On Wed., May 8, 2019, 08:17 Moritz Lennert,
<<a class="moz-txt-link-abbreviated" href="mailto:mlennert@club.worldonline.be">mlennert@club.worldonline.be</a>
<a class="moz-txt-link-rfc2396E" href="mailto:mlennert@club.worldonline.be"><mailto:mlennert@club.worldonline.be></a>> wrote:
<br>
<br>
On 8/05/19 14:00, Micha Silver wrote:
<br>
> You will most likely have to convert the points to
raster. But
<br>
before
<br>
> that, can you explain what you mean by "located for 10
m from
<br>
DEM", "10
<br>
> to 20".
<br>
<br>
Or, if you mean zones of equal height, you can transform
them to vector
<br>
polygons and use v.vect.stats on these polygons and the
points.
<br>
<br>
Moritz
<br>
<br>
>
<br>
>
<br>
> On 08/05/2019 13:31, Francois Chartier wrote:
<br>
>> Hi
<br>
>>
<br>
>> I would like to use mapcalc with types of input a
DEM (raster)
<br>
and xyz
<br>
>> property (vector). basically, I would like to do
a weighted
<br>
average
<br>
>> of data points located for 10 m from DEM, then 10
to 20 etc.
<br>
>>
<br>
>> _______________________________________________
<br>
>> grass-user mailing list
<br>
>> <a class="moz-txt-link-abbreviated" href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:grass-user@lists.osgeo.org"><mailto:grass-user@lists.osgeo.org></a>
<br>
>>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/grass-user">https://lists.osgeo.org/mailman/listinfo/grass-user</a>
<br>
>
<br>
> --
<br>
> Micha Silver
<br>
> Ben Gurion Univ.
<br>
> Sde Boker, Remote Sensing Lab
<br>
> +972-523-665918
<br>
>
<br>
>
<br>
> _______________________________________________
<br>
> grass-user mailing list
<br>
> <a class="moz-txt-link-abbreviated" href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:grass-user@lists.osgeo.org"><mailto:grass-user@lists.osgeo.org></a>
<br>
> <a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/grass-user">https://lists.osgeo.org/mailman/listinfo/grass-user</a>
<br>
>
<br>
<br>
<br>
</blockquote>
<br>
<br>
_______________________________________________
<br>
grass-user mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>
<br>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/grass-user">https://lists.osgeo.org/mailman/listinfo/grass-user</a><br>
</blockquote>
<pre class="moz-signature" cols="72">--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918</pre>
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