[Tagging] surface=ground/dirt/earth

Fernando Trebien fernando.trebien at gmail.com
Mon Mar 17 01:11:01 UTC 2014


Do you all agree with these wiki edits?

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.trebien at gmail.com> wrote:
> On Sat, Mar 15, 2014 at 6:41 PM, Martin Koppenhoefer
> <dieterdreist at gmail.com> wrote:
>>
>> 2014-03-15 16:29 GMT+01:00 Fernando Trebien <fernando.trebien at 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 at 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)



-- 
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)



More information about the Tagging mailing list