Andreas, just multiply your values by 10. Your version of grass
apparently doesn't support floating point results yet, so s.surf.idw
truncates the results of the calculation into integers... Also look
at the man pages for r.mapcalc for ways around this problem!
Martijn
We do have a site-list of field measurements
(soil resistivity) which we interpolate to
raster by means of s.surf.idw.Z-values in the site-list are floating-point
ranging from 0.0 to 25.0.The output of s.surf.idw creates a raster map with
only five categories.I need at least 255 categories, how can this be
accomplished ?Do I have to build categories outside grass, i.e.
create the site-list with categories for Z-values
instead of using original (measured) data ??Thanks for your help,
Andreas
Dept. of Geophysics
Univ. of Bremen