On Tue, Aug 5, 2008 at 4:41 PM, Stephen Gower <[EMAIL PROTECTED]> wrote: > I'm not quite sure who is considering this, but > http://www.cyclecheltenham.org.uk/map_standard.html claims to be "being > considered as the basis for a national standard." > > The actual map looks pretty good for an end-user and exactly the sort of > thing I want to see. However, I can see that trying to incorporate the data > into the OSM model will be scuppered by people saying it involves too may > subjective decisions. Anyone got any suggestions for a tagging scheme that > would allow us to use OSM data to produce maps to this Cheltenham Standard? >
Well, it'll be scuppered by the nature of OSM data collection, rather than the people pointing this out ;-) The main problem with these systems is that they're generally not well described when someone proposes something like "a new tag cycle_level 1 to 5 where 1 is easy and 5 is hard". This is obviously a lot better thought out, ie: it actually ties it to some degree to a cycling qualification that determines ability. But it's still going to have the problem of how you make sure everybody is tagging using the same baselines (ie: how much traffic is regarded as "moderate", how many HGVs are "few", which is more important to the classification: number of HGVs or road width?) So feel free to tag roads as cheltenham_cycle_level=blue, but expect half the people tagging it to get it "wrong". The descriptions for each level mention quite a lot of properties that make up each level. It may be possible to map some of these instead, to achieve a more dynamic effect. Dave _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
