[GRASS-user] mapcalc combining raster and vector
mlennert at club.worldonline.be
Wed May 8 06:10:07 PDT 2019
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
> On Wed., May 8, 2019, 08:17 Moritz Lennert,
> <mlennert at club.worldonline.be <mailto:mlennert at 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
> > 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.
> > 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
> >> 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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