[GRASS5] [bug #859] (grass) raster data at lower resolution: no resampling...

Markus Neteler neteler at itc.it
Mon Nov 26 19:44:27 EST 2001

On Mon, Nov 26, 2001 at 05:20:37PM -0600, Helena wrote:
> Glynn Clements wrote:
> > Request Tracker wrote:
> >
> > > (sorry to be so chatty)
> > >
> > > from the GRASS prog's manual I understand that raster data
> > > are resampled on the fly when looking at them in lower resolution.
> >
> > Yes. Note: "resampled" does not imply "interpolated"; you can't
> > meaningfully interpolate category values.
> >
> I have just send an email to Markus explaining just that. It was too long
> for the list. If raster represents a continuous field, one has to
> reinterpolate, if it is an area or line map with categories (what GRASS
> originally was designed for) the resampling was acceptable.

... maybe I am too tired right now, but how shall GRASS detect if
the raster represents a continuous field (in INT) or a categories map?
Currently GRASS seems to silently do something.

Please be patient :-)


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