> > Frank Aragona wrote: > >> I'd like to do an interpolation of xyz data points that > >> I have, and put the interpolated data on 100' x 100' > >> grid. So that each 100' x 100' square has an > >> associated elevation value. Any suggestions as to how best > >> to do this?
Hamish: > > depending on how many input points you have either: > > v.in.ascii, g.region res=100, v.surf.rst > > > > or for massive datasets (>1-3 million points): > > g.region res=100, r.in.xyz, r.to.vect, v.surf.rst > > > > > > choice of method and {r|v}.surf.* interpolation module are subject to > > nature of data & personal preference. see also r.surf.nnbathy in wiki > > addons. the modules' manual pages should help you decide. Frank wrote: > But I'd like the interpolated surface to be a set of > 100' x 100' vector grids, each 100 x 100 square with > a discrete elevation value. Is this possible? after import & binning as a raster use v.mkgrid to make your 100x100 grid, then use v.what.rast or v.rast.stats to give each square an elevation value. or maybe r.to.vect is easier? Hamish _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user