On 08/05/2019 16:10, Moritz Lennert
wrote:
On
8/05/19 15:03, Francois Chartier wrote:
Hi Micha,
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.
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.
Moritz
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. v.info -c or v.db.select then more
specific responses might be possible. Best would be a small subset
of the actual data.
On Wed., May 8, 2019, 08:17 Moritz Lennert,
<mlenn...@club.worldonline.be
<mailto:mlenn...@club.worldonline.be>> wrote:
On 8/05/19 14:00, Micha Silver wrote:
> You will most likely have to convert the points to
raster. But
before
> that, can you explain what you mean by "located for 10
m from
DEM", "10
> to 20".
Or, if you mean zones of equal height, you can transform
them to vector
polygons and use v.vect.stats on these polygons and the
points.
Moritz
>
>
> On 08/05/2019 13:31, Francois Chartier wrote:
>> Hi
>>
>> I would like to use mapcalc with types of input a
DEM (raster)
and xyz
>> property (vector). basically, I would like to do
a weighted
average
>> of data points located for 10 m from DEM, then 10
to 20 etc.
>>
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> --
> Micha Silver
> Ben Gurion Univ.
> Sde Boker, Remote Sensing Lab
> +972-523-665918
>
>
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Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
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