I'm considering putting together the following proposal. As it's somewhat intrusive, I thought I'd post here first to see if there was significant opposition. A wide-ranging discussion is better accommodated on a mailing list than on a wiki page.
The proposal is to replace: bridge=yes waterway=aqueduct highway=viaduct railway=viaduct with bridge=yes bridge=aqueduct bridge=viaduct bridge=swing bridge=... In other words, make all bridge-like structures values of the bridge tag. This would be acceptable on nodes and ways, although most instances would be on short-ish ways. Advantages: - Compatible with current usage of the "bridge" tag - Mappers can use "bridge=yes" if they don't care, or be more specific if they like - Renderers can have a generic bridge rendering and specialize if and when the learn particular values - No more clashes with the highway/waterway tags As someone said in the Viaduct change proposal: "Viaducts are currently properties of the rail and highway tags, which is confusing. It also means you can't define the kind of highway or railway that the viaduct carries, which is pretty useless!" Someone pointed out in the last discussion that a viaduct is technically not a bridge. _Technically_, this may be true, but I think the above suggested tagging scheme is highly understandable. Everyone knows what you mean. Another option: - Use bridge=yes for all types of bridge. But this loses important information - some renderers want to use a different icon e.g. for a swing bridge that you have to open by hand. Relevant current proposals: http://wiki.openstreetmap.org/index.php/Proposed_features/Viaduct http://wiki.openstreetmap.org/index.php/Proposed_features/Aqueduct http://wiki.openstreetmap.org/index.php/Proposed_features/Bridge_Type Gerv _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
