Martin Besta wrote: > > > >> /I was trying first v.buffer, then v.db.addtable and finaly > >v.overaly > intersect with input line for buffer. But then is the > >output line > again. > >> / Hamish: > > can you reproduce the effect using the demo spearfish dataset, and > > post the command line commands?/ > > > Buffer 5 meters for layer of roads from sperfish60 dataset > 1. v.buffer input=roads output=roads_5m type=point,line,area layer=1 > buffer=2.5 scale=1.0 tolerance=0.01 > > 2. v.db.addtable map=roads_5m layer=1 'columns=cat integer, atribut > integer' > > 3. v.overlay ainput=roads atype=line alayer=1 binput=roads_5m > btype=area blayer=1 output=overlay_roads_buffer5m operator=and > olayer=1,0,0 > > Output is always a line, however i need the polygon.
The output is correct for "v.overlay operator=and". The intersection between the two vectors only happens where they both exist, and that is only exactly on the line. see http://grass.ibiblio.org/grass60/screenshots/vector.php http://grass.ibiblio.org/grass57/tutorial/vectoroverlay.html > When I am executing v.overlay (to clip my map with boundary line) I > recieve always the clipped line (ainput is line, binput is area), > however I need the polygon. When I switched first and second input > layer, I had recieved an empty layer. I think you want "v.select operator=overlap", not v.overlay. Hamish _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
