3D raster interpolation between DEM and Top of Bedrock

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3D raster interpolation between DEM and Top of Bedrock

Francois Chartier
Hi, 

I would like to stop the vertical interpolation of soil properties at the DEM (top) and bedrock (bottom).  I am using v.vol.rst, or v.vol.idw, most likely v.vol.rst.

Can i interpolate with the DEM and bedrock surfaces as input to the interpolation (stop interpolation at upper bound (DEM) and lower bound (bedrock surface), or

Is this process done in a second stage where the 3D raster is a box, and using grass the raster above the DEM are cut off, and those that are below the bedrock surface as also removed.  My gut feeling is that this is correct approach.  If this is the case, what do I use?

Thanks,
Francois

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