On Sun, 2014-03-16 at 22:11 -0300, Fernando Trebien wrote:
> Do you all agree with these wiki edits? > 1. Yes, almost. Not too happy with the term 'stiffness'. Maybe just remove the term 'stiffness' ? 2. Yes. 3. Yes. 4. Yes, I guess so ... However, while a good job Fernando, I still think we are missing the real issue here. What people and routing engines want to know is how usable a road is. For most people and most situations, people want to know if they will be OK using it in their [4x4, SUV, Conventional car, silly car] given their [extensive..zero] rough road experience. However, this approach is seen as 'subjective', a serious crime ... Sigh... David > http://wiki.openstreetmap.org/w/index.php?title=Key%3Atracktype&diff=1002090&oldid=992679 > > http://wiki.openstreetmap.org/w/index.php?title=Template%3AMap_Features%3Atracktype&diff=1002096&oldid=971383 > > http://wiki.openstreetmap.org/w/index.php?title=Key%3Asmoothness&diff=1002098&oldid=905282 > > http://wiki.openstreetmap.org/w/index.php?title=Key%3Asurface&diff=1002099&oldid=970317 > > On Sun, Mar 16, 2014 at 6:07 PM, Fernando Trebien > <fernando.treb...@gmail.com> wrote: > > On Sat, Mar 15, 2014 at 6:41 PM, Martin Koppenhoefer > > <dieterdre...@gmail.com> wrote: > >> > >> 2014-03-15 16:29 GMT+01:00 Fernando Trebien <fernando.treb...@gmail.com>: > >> > >>> "tracktype" is the "degree of compaction" of the material > >>> (regardless of material) > >> > >> > >> > >> I have always more thought of it "how much it was constructed", while > >> tracktype=1 is a paved road, 5 will be a track on grass (almost or not > >> constructed at all) and the rest in between. Generally a tracktype=grade1 > >> should be easily navigable by bike or foot also after days of rain while > >> for > >> grade2 you would hope so and grade3 is not clear, 4 and 5 probably not. In > >> the end it is a generalized hierarchical system that comprises several > >> single characteristics to come to a summarizing tag value (and the single > >> characteristics are not documented and may vary on individual basis). > >> Somehow it still works as you can compare the values with other tracks in > >> the same area. > > > > Hm I think that someone on a city bike (not on a mountain bike) would > > find tracktype=grade2 somewhat inconvenient, but still usable indeed. > > > > Anyway, I'm making these questions because thinking of "degree of > > compaction" (same as "hardness" maybe) makes tracktype essentially > > independent from both smoothness and surface tags. You can then guess > > more accurately things such as expected speed, comfort level, draft > > forces, and the risk of getting bogged. > > > > One question: do you think that an almost flat natural rock path > > should be tracktype=grade1 (because it's closer to "compacted") or > > tracktype=grade5 (because it's not "constructed")? > > > >> > >> > >>> > >>> - "smoothness" is the "degree of irregularity" of the surface (for > >>> wheeled vehicles, also regardless of material) > >> > >> > >> > >> yes. in other words how "smooth" or "even" the surface is. > >> > >> > >>> > >>> - "surface" more closely represents the material structure, usually > >>> regardless of other characteristics (with a few exceptions) > >> > >> > >> > >> yes, surface is a mixture of the ~material (roughly classified) and in some > >> cases the way of application / the overall structure (e.g. cobblestones). > >> > >> cheers, > >> Martin > >> > >> _______________________________________________ > >> Tagging mailing list > >> Tagging@openstreetmap.org > >> https://lists.openstreetmap.org/listinfo/tagging > >> > > > > > > > > -- > > Fernando Trebien > > +55 (51) 9962-5409 > > > > "The speed of computer chips doubles every 18 months." (Moore's law) > > "The speed of software halves every 18 months." (Gates' law) > > > _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
