Martijn van Oosterhout wrote: >> How to tag "Schengen" boundaries within EU? There should be some >> difference between e.g. Polish eastern and western borders. > I'm guessing it should be the other way round. Countries have borders > and Schengen is a relation associating all the countries... > That way we won't accedently forget some of the borders in south > america, for example...
I'm not so sure we can model it is a relation between countries, unless we have a way of excluding parts of some countries. In most Schengen cases it's more of a philosophical issue than a practical one, as most of the exclusions are places that don't have land boundaries with other members, but there are a few that do, such as Büsingen. (Although I'm not sure whether that is a permanent exclusion, or just temporary until Switzerland implements). It's also important to remember that it's not really an EU thing at all. Some EU countries aren't members, and some non-EU countries are. The most important of these if we're going to render borders differently is Norway (Iceland is slightly different by virtue of being an island, and Switzerland, although a signatory, hasn't implemented yet). But if we're going to render borders differently between countries that have a common travel area, we're going to need to do it for more than Schengen, anyway. Just adding an extra tag to the border way to say whether it's an open border or a closed border seems much simpler than trying to model relationships at a country level. Tony _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
