[GRASS-user] r.resamp observations

[Glynn Clements]

Hamish wrote:

> > > r.resamp.stats seems to shift the data southward by ~ 1 cell vs.
> > > r.resamp.interp, r.resamp.rst, and g.region+r.mapcalc methods.
> > 
> > Is this with a recent CVS copy? There was a bug which resulted in a
> > south-west shift of 0.5 map units, which was fixed on 2006/12/07.
> 
> ok, that's probably it; no time to retest now. Note the CVS log message
> says it applies to lat-lon locations, and this was not LL.

Actually, it applies to all locations, but a 0.5 unit shift is a lot
more significant if the units are degrees.

The other side of the coin is that it was supposed to be a 0.5 cell
shift, i.e. round rather than truncate so that cells were selected by
their centres rather than their corners. The 0.5 unit shift was
instead of the 0.5 cell shift; it may be the lack of the 0.5 cell
shift that is at issue.

-- 
Glynn Clements <glynn at gclements.plus.com>