[STATSGRASS] krigged dem lost detail

[Hamish]

> I am comparing the results we get when re-interpolating a DEM to a
> higher resolution. I did it with krigging (in R, with gstat) and with
> RST. In the final result it looks like the krigged DEM has lost
> detail, while the RST DEM kept those.
> see it:
> http://www.igc.usp.br/pessoais/guano/tempo/krigging.jpg
> http://www.igc.usp.br/pessoais/guano/tempo/rst.jpg
> 
> I don't know why this happens, since they were interpolated wit the
> same resolution, based on the same dataset.


be careful you haven't added detail that isn't really there due to
spline artifacts. Perhaps resample known DEM at lower resoution and then
re-interpolate at original resolution to compare which does a better
job recreating the original DEM?

r.resamp.rst



Hamish