On Mon, Mar 31, 2014 at 11:16 AM, Christian Willmes <[email protected]> wrote: > Hello, > > I want to interpolate a regular 1° x 1° temperature (°K) data vector > point grid to a higher resolution, say a regular 0.1° x 0.1° raster grid. > > I assume that the temperature data is continous and the data between the > cells should be interpolated as if they were on a straight gradient > line/plane between the given 1° points, by keeping the originial input > value for the given points (on the 1° x 1° grid). > > What would be the best interpolation method in GRASS to get this result? > > I assume, a simple bilinear interpolation would be fine? Is that > correct?
Yes, I think so: you should just be aware that a "lot" of increase needs to be supported by information, otherwise it is pure cosmetics. see http://grasswiki.osgeo.org/wiki/Interpolation#Resampling_of_raster_maps_to_finer_resolution > Which tool does this from vector points (r.bilin only takes > raster)? Be sure to use a fresh GRASS version. If you have points, you can use the fast module * Interpolating from vector points with B-splines (v.surf.bspline) Best Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
