Q: s.surf.idw

[Malcolm Williamson]

On Fri, 22 Nov 1996, A. Rosenberger wrote:

> 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
> 
Adreas,
Multiply your Z values by 10 (use awk). Now you know why the next phase 
of GRASS was going to be floating point! Regards,
--
Malcolm D. Williamson - GIS Specialist           E-mail: malcolm at cast.uark.edu
Center for Advanced Spatial Technologies      Telephone: (501) 575-6159
Ozark Rm. 12                                        Fax: (501) 575-5218 
University of Arkansas              
Fayetteville, AR 72701