John Smith wrote: > --- On Mon, 24/8/09, Roy Wallace <[email protected]> wrote: > >> The ways must be split so that they end (or begin) at the >> intersection. (This is required for most of the relation >> proposals >> anyway, IIRC.) >> >> Then, each way to which a stop sign applies should be >> tagged with >> stop=at_last_node (or stop=at_first_node). Seems simple >> enough. >> >> It's a pity that "_last_" and/or "_first" must be >> specified, but that >> is the only way you get away with not making a relation - >> it encodes >> way and node information in a single tag. > > I liked your suggestion of putting a node just before the intersection and > tagging it, making relations and splitting ways sounds like something very > convulted just for a stop sign so most people probably won't be bothered.
The exact problem here is that the 'STOP' requirement only relates to the junction with another road and is therefore not a tag of the way or the intersection, but rather information relating to approaching one from the other. Adding an extra node does make sense, but probably needs a 'relation' to the intersection as well? In any case the direction through this new node is the critical piece of information? Tagging ways would require that every section of a way is broken up. I'm thinking of some route around here that have several intersections along them, many but not all of which are compulsory stop along that single way. Simply adding nodes on the correct side of each intersection would be somewhat easier to implement, while currently these restrictions are not recorded. The information is only really needed for routing software, where the trip time will be affected by HAVING to slow to a stop for each of those junctions on a route, but in this case, the exact location is not critical, as in practice one physically stops short of the actual intersection anyway. -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
