Thanks I can confirm, that using -n flag works
Jachym 2010/4/13 Paul Kelly <[email protected]>: > On Tue, 13 Apr 2010, Jachym Cepicky wrote: > >> Hi, >> I can not get reasonable result (compared with v.surf.rst) from >> v.surf.idw using attached input vector points >> >> is it possible, that v.surf.idw is kind of broken? > > Hello, > I can confirm that I can reproduce the strangeness, that it only happens > when *not* using the -n flag (i.e. when indexing points) and that it happens > when interpolating a relatively small number of points into a region with a > relatively high resolution. E.g. for the given data I observe strangeness > for a resolution of 10, but it goes away either by specifying the -n flag or > decreasing the resolution to 15. > > It does indeed look to be caused by my buggy code from 2003, or (perhaps > less likely; I'm not sure) some later change to it - specifcally something > to do with the "shortlist" method of avoiding an intensive search for nearby > sites/points when the number of points is relatively small compared to the > region size. > > I can't see anything obviously wrong but I'll look into it over the next few > days... > > Paul > -- Jachym Cepicky e-mail: jachym.cepicky gmail com URL: http://les-ejk.cz GPG: http://les-ejk.cz/pgp/JachymCepicky.pgp _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
