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Hi ,<BR>
> >> > I'm working with a database for the three-dimensional interpolation in<BR>> >> > GRASS which is composed of data ranging from 0 to 100, and<BR>> >> > coordinates x,y,z, to conduct a zoning 3D attribute.<BR>> >> > I'm using v.vol.rst, but I'm having trouble finding the best<BR>> >> > parameters for 3D interpolation.<BR>> >> ><BR>> >> > I realized several simulations varying the parameters npmin,segmax, tension and smooth.<BR>> >> > However, using as example the default parameters of v.vol.rst (tension =<BR>> >> ><BR>> >> > 40, smooth = 0.1, = 50 segmax, npmin = 200 and dmin= 0.5) the results generate voxels with an<BR>> >> > average of 77 and standard deviation equal 8.<BR>> >> > But most of my input data is close to a range of values from 90 to<BR>> >> > 100 (46% of vector points), but the volume voxels generated for<BR>> >> > this interval has a ratio of 3%.<BR>> >> > How these parameters influence the equation of the spline v.vol.rst?<BR>> >> > What parameters could be influence this result?<BR>> >> > Whereby the highest percentage of interpolated values is<BR>> >> > between the range of values from 75 to 90 and not 90 to 100.<BR>> >> > Why are the values from 90 to 100 may be having a small weight in<BR>> >> > the interpolation?<BR>> >> ><BR>> >> > Thanks<BR>> >> > Vivian<BR>> >> ><BR>> >> ><BR>> >> ><BR>> ><BR><BR> </body>
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