2009/9/21 Richard Weait <[email protected]>: > In earlier discussions with Paul (cc:'d) we talked about using the > network key to distinguish road networks that use shields[1]. We had > agreed on using a ":" separator like "US:I" but I'm arguing against > that now. First we are not separating equal items, we're adding > specificity to one selector. Second, we're planning to use the > network values in filenames, we should choose characters that won't > lead to problems in on OS or another when used as a file name. Third > OSM key:values have been lower case other than Proper (Street) Names. > So I suggest we pattern on network=us_i for Interstates, us_us for US > Routes, us_ny_ny for New York State Routes, us_ny_ny_co for New York > county roads, etc. These tags should sort nicely alphabetically for > bug-squashing and allow collision avoidance with imperfect knowledge > of other international network naming systems.
What you are doing specifically will end up causing inconsistent data because you don't see us_ny_ny_co on signs and people won't tag it. In the case of US interstate it should just be network=I, state highways network=S That is enough information combined with a database or shape file with all the meta information about what shield exists in which location, and defaulting to UK style signs if a localised style hasn't been defined otherwise. _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
