* Paul Johnson <ba...@ursamundi.org> [2012-04-04 14:01 -0700]: > OK, I'll bite. How is putting banners in the network tag > preferential? why not something like... > > network=US:TX:FM > modifier=Business > > network=US:US > modifier=Business > is_in=Maryland
Each of the potential tagging schemes had drawbacks. One of the chief drawbacks of this one is that a naive data consumer that looks at the network and ref tags but not the modifier tag will get drastically incorrect results. (If it looks only at the network tag, then that's useful information on its own. If it looks only at the ref tag, it's not that useful, but it's also not likely to come to incorrect conclusions about the data.) For the record, the drawbacks of the other approaches are: * network=US:US, ref=50 Business Mingles base reference numbers and route modifiers together in a way that's difficult or at least annoying for data consumers to process. Addressing this problem was one reason for separating the network and ref tags on route relations in the first place. * network=US:US:Business, ref=50 Separates mainline routes from their alternates and variants, even though all of them are, outside of OSM, in the same road network. Complicates things for data consumers who care about the main network but not whether a route is a mainline or variant (not that there are any such consumers that I know of, but it would be a problem for them). -- ...computer contrarian of the first order... / http://aperiodic.net/phil/ PGP: 026A27F2 print: D200 5BDB FC4B B24A 9248 9F7A 4322 2D22 026A 27F2 --- -- <Signal_11> I'm trying to grow sentient molds to karma whore on slashdot. -- seen on #kuro5hin ---- --- -- _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us