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

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this bug's URL: http://intevation.de/rt/webrt?serial_num=859
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Hi again,

(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.
I have tested this and found, that the maximum value is used
instead... that's wrong in my opinion.

An example

#use g.region to select a 6x6 subregion, say, at 30m resolution
g.region
#calculate a test map
r.mapcalc test="row() + col()"
#look at it:
d.mon x0
d.rast test; d.rast.num test
r.out.ascii in=test out=-

#switch to half resolution
g.region res=60
d.mon x1
d.rast test; d.rast.num test
r.out.ascii in=test out=-

# compare.

The last years I thought that the programmer's manual is right.
Obviously not (or not any more).

Looks like another bug,

Markus


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Date: Mon, 26 Nov 2001 23:50:07 +0100
From: Markus Neteler <neteler at itc.it>
To: grass-bugs at intevation.de
Subject: raster data at lower resolution: no resampling...
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