[Qgis-user] Fwd: qgis - v.vol.rst from grass

[Francois Chartier]

I am trying to interpolate particle size of soils, which i will then
transform into a permeability.
the option to stack multiple raster is the path i am going to use, and i
think kriging is the probably the most suited for soil properties. Inverse
distance should be good and lighter in terms of computation.
i have to figure out to run the interpolation based on a query result.  i
am not sure if this has to be a 2 step process or 1 step.

On Sun, Oct 28, 2018, 11:34 Nicolas Cadieux, <nicolas.cadieux at archeotec.ca>
wrote:

> Hi,
>
> This is interesting.  Basically the end result is a multi band raster,
> which can also be done by stacking multiple band rasters.  I don’t know
> anything about this v.vol.rst algorithm but it sound interesting. I do do
> see a problem though. Your data sets may not all like to be interpolated
> with a single algorithm. So unless you can modify the interpolation
> algorithm for each  band, you will probably end up with a bad raster data
> set.  The chosen algorithm must work like the phenomenon you are trying to
> study.
>
> As an example, using a simple TIN to predict the weather will most likely
> fail as weather pattern don’t work like a TIN. Inverse distance weight
> would probably be better.
>
> Nicolas
>
> > Le 28 oct. 2018 à 11:00, Francois Chartier <fra.chartier at gmail.com> a
> écrit :
> >
> > Hi
> >
> > Is the plugin v vol rst available from within qgis?  i didnt see it in
> the list of vector plugin from grass.
> > i am looking for a 3d interpolator and i believe only grass can do this
> in open source.
> > Are there other plugins that can do 3d interpolation?
> > by 3d i am not referring to interpolation of elevation, but by
> interpolation of 3d dataset with xyz + attribute (ex: soil moisture), with
> data points vertically stacked, and would need to interpolate verically and
> horizontally.
> >
> > thks
> > f
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