-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Dermot McNally wrote: > 2008/10/5 Ed Loach <[EMAIL PROTECTED]>: > >> 30mph. If we had stayed with assumed country-specific units then the tagging >> would have been more consistent, easier for the user to tag, and not require >> a conversion to a random number of decimal places. > > I'm not a fan of the options that include suffixes or other tricks to > imply units. That said, even that approach is better than using > country-specific units, because it's a huge burden on applications to > work out what country a restriction falls within (twofold, since the > border data is often imprecise too). Consider the Irish border, which > is also an imperial/metric border. Yuck! > > A further drawback with the approach is the assumption that units stay > uniform within a particular country. But in the UK, it's getting > common for height restrictions to be stated in dual units. So for > transitional cases like that, the country-specific model breaks down. > > I'm with Shaun on the namespacing thing. Allowing fields like maxspeed > to contain normalised, pure numeric data is beneficial for fast data > extraction, and the namespaced approach allows for automatic updating > of the "real|" numeric field. > > Dermot
Maybe <grin> this is calling out for a 'bot approach, to take maxspeed:mph & add a numeric maxspeed, to check out maxspeed=30's & mark them in some way (restricted to UK, obviously), and to check for entries of both=30 & fix them? Note: I haven't said "I'll do it" because I know I'd be shot... I think a lot of people have refrained from using these tags where the speed limit is what you'd expect, so residential defaults to 30mph, trunk to 70, etc & tagging it is not required - so any bot approach should respect that. +1 on the namespace; I'm not generally keen on it, but here it makes sense. Either the way mentioned, or maxspeed:en as per name:en for consistency? Mark -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFI6/LZJfMmcSPNh94RAijGAJ9M/dxPTjuPkCsUNgkbMhs9sFLupwCePQsZ oQltkcfxNEHS9tLSEfMxtfI= =JYyp -----END PGP SIGNATURE----- _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
