Hi, I have some troubles with understanding v.category.
I have a map with the road network. After using v.clean, I have lines with the same cat. Now I want to give each line a unique cat going from 1 to N, and then add 4 columns with the coordinates of the start and end coordinates of each line. So I did use: v.category input=roads output=roads_nocat option=del for removing the categories. I did also remove all database entries using echo "DELETE FROM roads_nocat" | db.execute which deletes all rows but leaves the table in the database (using the default DBF database) and then I did add the categories again using: v.category input=roads_nocat output=roads_cat option=add There are still some lines sharing the same cat... As a consequence, if I call then: v.db.addcol map=roads_cat columns='startx DOUBLE PRECISION, starty DOUBLE PRECISION' v.to.db map=roads_cat option=start columns=startx,starty I get logically a warning for the lines sharing the same cat Is this normal behaviour? What did I wrong? Sorry if I am missing something obvious. Christian _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
