[STATSGRASS] isolines

[Roger Bivand]

On Mon, 28 Feb 2005, Tim Michelsen wrote:

> > GRASS has limited support for TINs, you would have to extract values at
> > the nodes (v.in.ogr? -> vector points), interpolate to a raster map
> > using splines (v.surf.rst), then create vector isolines with r.contour.
> Do you know any R package that might be able to do the job?

No direct route from points to contours without interpolation in R. The
nearest I can see would be to use GMT's pscontour, inputting an ASCII xyz
file, and dumping the contour line output to file.

Roger

> 
> Thanks,
> Tim
> 
> _______________________________________________
> statsgrass mailing list
> statsgrass at grass.itc.it
> http://grass.itc.it/mailman/listinfo/statsgrass
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no