Back to manual editing, then: the information obtained from r.support is
stored in $LOCATION/cellhd/[mapname]. I don't really understand what you
mean by default rows and columns: the default settings are stored in a
file called $LOCATION/DEFAULT_WIND, but I am under the impression that
this file is only valid inside mapset PERMANENT. Changing the # of rows
and columns directly with r.support is only useful if you have incomplete
raster files, otherwise g.region will do everything you want.
Ok, thanks. I was under the impression you could change the map resolution
and screen resolution independently.
> 2./ We have a mapset whose overlay is 15135 polygons within GRASS. When
> we use "v.out.arc type=polygon vect=overlay arc_prefix=overlay, it
> generates overlay.* files which have 23400 polygons. Is there a
> reason for this, or is v.out.arc broken ?
I seem to recall that ARC never accepted lines with more than 500
vertices, so every line that is longer will be broken into segments.
Ok, but that doesn't explain why I end up with .lab file which has almost
10k *more* polygons than the data I started with. I can accept that the .pol
file utilizes more segments, but this shouldn't affect the final polygon count.
T.
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Thomas Orth, M.Sc. Alberta Research Council
Research Officer 3rd Floor, 6815 8th Street N.E.
Advanced Computing & Engineering Calgary, Alberta T2E 7H7
Spatial Information Management and Analysis Canada
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Email: Phone: Fax: WWW:
orth@arc.ab.ca (403) 297-7571 (403) 297-2339 http://www.arc.ab.ca
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I'd be really surprised if my opinions reflected those of my employers.
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