On Sun, 2015-03-15 at 16:58 +0000, Kytömaa Lauri wrote: > So far, nobody has proposed what I have come to think would be the most exact > and most usable bit of information a _mapper_ can provide: "Did you get > through with transport mode x?" Possible answers are: > - no > - just barely > - with extra effort/concentration/some difficulty > - yes
That is most certainly the info people want and need but I'd suggest your approach may be a little too detailed. With (eg) four possible states and a plan to describe just about every vehicle on the road, too much data and too difficult to use. I do believe we, as mappers, need to make some decisions, its not too hard to divide our vehicles into, say, six or so categories and apply just a yes/no to each. Yes, its error prone but the error would be only one level and would still be infinitely more valuable than no info at all. David > What constitutes "some difficulty" for each mode can be discussed more > easily; i.e. for roller skates (never have) ruts, sett, tram tracks(?), but > not curbs as such? These can be tabularized in the wiki later. > > If you're in a "regular sedan", you can steer around the potholes and slow > down (i.e. "concentration"), but if the wheels have to follow a very narrow > path or the bottom of the vehicle would hit the ground, it's "just barely" > for regular sedans. Or whatever local conditions the mapper comes across. > > Surely, if the track is "just barely" traversable in a highly modified off > road vehicle of brand Y with extras from brands Z and W, the driver of any > other vehicle can assume they won't be able to use the track. > > I haven't drafted the actual tags in detail, but I do have used > - police:mondeo=yes (originally as "here I saw a Mondeo use the footway", but > later also "I've seen other vehicles drive here or it's obvious a normal car > could physically use this") > - police:mondeo=no > - police:transporter:conditional=no @ (winter & 2wd) ( as in "here I saw a > VW Transporter fail to get up the incline on a footway") > > The keys for a more general "suitable for use" tagging would have a prefix, a > separator character (probably ':'), the general vehicle category possibly > followed by more details (either a model, or something like high clearance), > and the optional accessories would use the :conditional syntax. > > known_suitable:motorcar = barely > known_suitable:motorcar:911 = no > known_suitable:motorcar:high_clearance = effort > known_suitable:Range_Rover = yes > > The first driver can always add just the one tag that applies to their > vehicle. > > This might seem like a lot of work, but we have time, and mappers; enough > data will accumulate with patience. > > _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
