-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/11/15 10:25, Mark Goodge wrote: > On 04/11/2015 08:40, Lester Caine wrote: >> OK finally spotted what is going thanks to the new style sheet ;) >> >> The question is where do we get the 'tertiary' designation from since in >> many cases there is little to distinguish those roads from >> 'unclassified'. > > As far as the UK is concerned, this is part of the official categorisation. Although we're only used to 'M', 'A' and 'B' appearing on signs, the actual classification goes a stage further to include both 'C' and 'U'. This data is part of the National Street Gazetteer (NSG). The NSG is used by commercial cartographers, and is how Google, Bing, OS, et al tell the difference between tertiary and residential routes. Interesting that this discussion should arise now. While investigating why MapQuest Open wasn't joining a roundabout[0] near me to the roads leading to it recently (the answer seems to be that MQO doesn't render tertiary_link) I stumbled upon a changeset[1] that highlighted questions I already had about the tagging of roads in Mickleover.
For example, I'm fairly sure Ladybank Road and Hedingham Way should be highway=residential, and Vicarage Road and Catterick Drive certainly don't feel like tertiary roads, even if they are part of the Mickleover bus route. I was certain I'd seem some guidance on the wiki as to what visual clues indicate a road's likely designation, but didn't immediately find it, so added it to the to-do list. If I were to follow the guidelines in that changeset, Uttoxeter Road (B5020) would be a tertiary road, and Etwall Road would be unclassified. I don't know which roads are maintained by the Highways Agency, but my gut says that the A38 would be a trunk road, and the A516 might be primary. JT [0] http://www.openstreetmap.org/way/26773899 [1] https://www.openstreetmap.org/changeset/25091307 - -- - ---------------------------------------+-------------------------------- James Tait, BSc | xmpp:jayte...@wyrddreams.org Programmer and Free Software advocate | Tel: +44 (0)870 490 2407 - ---------------------------------------+-------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlY5/+kACgkQyDo4xMNTLiapBgCfVsxvAPmgs0KaxAU2NSjv7kYM JggAn0lAsn9xqNjobIkL1qR7C/gpkUgc =NKox -----END PGP SIGNATURE----- _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
