Silvia Simoni wrote: > I need to patch dems with different resolutions (1x1m) and (2x2 m) and > resample them to a coarser resolution (10x10 m). Which is the correct > procedure? > > a. resampling the 1x1 dem to 2x2 using r.resampl.stats -w (to be more > accurate) > patch them all at 2x2, resample the patched dem to 10x10m; > > b.resample the 1x1 and 2x2 dem to 10x10 m separately using > r.resampl.stats -w, and then patch them all.
In most cases, the most accurate approach is to set the region to 1x1, patch (which will resample everything to 1x1 by nearest-neighbour), then resample to 10x10 with r.resamp.stats. The problem with patching down-sampled data is that r.patch won't merge partial results at the boundaries. It will simply discard choose one value and discard the others. -- Glynn Clements <[EMAIL PROTECTED]> _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
