# extract one railroad line for this example v.extract input=railroads output=myrr cats=1 # show line, category, direction (to find the beginning) g.region vector=myrr d.erase d.vect myrr display=shape,cat,dir # insert nodes at a distance not longer than 1000m v.split input=myrr output=myrr_split_1km length=1000 d.vect myrr_split_1km display=shape,topo
Note: In case that the vector line data are not polylines, generate first polylines as the second step, eg.:
# join segments into polyline v.build.polylines input=myrr output=myrr_polylines # regenerate categories v.category input=myrr_polylines output=myrailroads option=add
# insert vertices at a distance not longer than 1000m v.split -n input=myrr output=myrr_split length=1000 d.vect myrr_split display=shape,topo
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