On 07/04/2008 11:11, Frederik Ramm wrote: > Hi, > >> But this is kind of the point - if you are able to automatically >> create the relations (and presumably automatically fix them if >> someone makes the way tags inconsistent with the relation tags) >> with very little effort, is there a good reason to create them in >> the first place rather than deriving that data as and when you need >> it? > > I assume it will usually be easier to check a machine-readable > relation than to compare tags.
And to take the A11/A14 example again, if the A11 in effect disappears where it is coincident with the A14, the A11 is discontinuous. How do you therefore distinguish from the ref alone that the pieces of the A11 in the UK are different from the A11 autobahn in Germany. Determining which country they are in is hard (even harder when there is no water between them). And the European E route numbers cross national boundaries (actually there's an example where UK roads really do have more than one ref, though it's unlikely we'd tag them because there is no evidence of this on road signs). David _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
