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

[Nicolas Cadieux]

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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