[GRASS5] [bug #3515] (grass) r.surf.contour: max output=10*max input

Request Tracker grass-bugs at intevation.de
Fri Aug 12 07:51:59 EDT 2005

this bug's URL: http://intevation.de/rt/webrt?serial_num=3515

Subject: r.surf.contour: max output=10*max input

Platform: GNU/Linux/i386
grass obtained from: CVS
grass binary for platform: Compiled from Sources
GRASS Version: 61 cvs 09.08.05

# I did the following:

r.surf.contour -f input=melio_poz_clear_rast output=melio_poz_clear_rast_10_dem

# in a region of:

GRASS 6.1.cvs (caves_utm33):~ > g.region -p
projection: 1 (UTM)
zone:       33
datum:      wgs84
ellipsoid:  a=6378137 es=0.00669438
north:      5679480
south:      5679190
west:       601920
east:       602250
nsres:      10
ewres:      10
rows:       29
cols:       33

# The max output is 10 times more than max input!!!, see:

# the input

r.info -r melio_poz_clear_rast

# the output

r.info -r melio_poz_clear_rast_10_dem

What's interesting, this *error* high values seem to be *concentrated* in the lower-left corner of the output, *where no input data is present* see:


The yellow background is the output DEM, the colour overlay is the input. Black arrow indicates the error (red perdendicular lines).


Could it be raleted to the "dozens of warnings" http://intevation.de/rt/webrt?serial_num=3514&display=History issue?

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