Hi users, i've read the help and other posts regarding v.to.rast, but i'm still not piecing it all together and would appreciate some help. i have a vector map of roads that i want to convert to a raster, so it is lines. v.support - fine, but i can not figure out what i need to do with v.digit (and if v.digit is necessary), don't know how to use. after running v.support, if i just run v.to.rast as:
v.to.rast input=roads output=roads ERROR: Column parameter missing (or use value parameter) but if i run as: v.to.rast input=roads output=roads5 use=attr column=ROADNR (or column=CODE, etc..) then i get a raster. values of the raster differ based on what column i choose. so my question is, how do i choose the column, and how do i know what to set use= to (*attr,cat,val,z,dir)* * * running db.describe on the road vector, i get the following info: db.describe -c table=roads ncols: 14 nrows: 383 Column 1: cat:INTEGER:11 Column 2: UserId:INTEGER:11 Column 3: FNODE_:INTEGER:11 Column 4: TNODE_:INTEGER:11 Column 5: LPOLY_:INTEGER:11 Column 6: RPOLY_:INTEGER:11 Column 7: LENGTH:DOUBLE PRECISION:20 Column 8: GI00701_:INTEGER:11 Column 9: GI00701_ID:INTEGER:11 Column 10: YEAR:INTEGER:11 Column 11: ROADDEC:INTEGER:11 Column 12: CODE:INTEGER:11 Column 13: STAT:CHARACTER:1 Column 14: ROADNR:INTEGER:11 if anyone can please advise the process of turning a vector into a raster, i.e. what commands are necessary first and how to apply them, i would really appreciate it. thank you, Janet
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