[GRASSLIST:4692] Re: updated interpolation

[Jaro Hofierka]

Check if the s.surf.rst is taking the right z-values from your site 
file. Then run it with default values (tension, smooth, etc.).

J.

orkun wrote:

> Hello
>
> when I interpolated my site map with using spline-tension method, I 
> got a raster map containing meaningless negative output values despite 
> the fact that I have only positive input values.
>
> why does spline tension method output negative values from
> positive input data ?
>
> anyone has an idea?
>
> thanks in advance
>