[GRASS-user] Vectorise a raster file
hamish_nospam at yahoo.com
Sun May 14 21:34:17 EDT 2006
> I created a raster with the visiblity function, and I wanted to
> vectorise it. I used v.to.vect but the result it is not good because
> there are holes in area that are fill by color (and have to be
> empty). I try to use mapcalc to remove all bad area, i try to remove
> it by db.execute but, if I list value, I have for all item value=1
> but if I try to display the vector using this sql statement :
> value=1, the vector is correctly displaying ! If I export it in shp
> the vector is not correct !
This is a feature. d.vect by itself fills holes as well. If you only
want to show areas with data use "d.vect cats=1-999999".
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