[GRASS-user] Using r.mapcalc to extract road network from satellite imagery

[Nathaniel Iwuchukwu]

Hi all,
i have been using V.clean to get a straight line of road network from my
satellite imagery which i have successfully classified and converted to
vector from raster.
I read some articles on r.mapcalc as a possiblility for extracting a clean
road network but i tried using it but did not notice any visible change on
the map. though am not good with using all the variable available for it.
have anyone used this command or is there a better command i could use?
Thanks.
Nath
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