[Tagging] Tags useful for rendering of roads in poor conditions

[Fernando Trebien]

Hm there are a few types of vehicle ways
(highway=residential/living_street/pedestrian/service/cycleway) which
present high usage by non-vehicles, so I think it would also make
sense if the renderer also checked for these values:
- mtb:scale=0
- sac_scale=T1
- wheelchair=yes/limited

Which, of course, could be checked for any other kind of way, but
especially for these kinds this check seems important.

On Fri, Jan 3, 2014 at 11:58 PM, Fernando Trebien
<fernando.trebien at gmail.com> wrote:
> I mean, maybe the renderer can follow this logic: all untagged ways
> are paved ("good") by default, and they're represented as "bad" if
> they include any of the following tags with different values than
> those shown:
> - tracktype=grade1
> - smoothness=excellent/good/intermediate
>
> Thus, it would ignore the value of the surface tag. This would leave
> our current tagging system unchanged.
>
> On Fri, Jan 3, 2014 at 11:42 PM, Fernando Trebien
> <fernando.trebien at gmail.com> wrote:
>> This is why I said that a full description that is useful to everyone
>> would require many more tags than we currently have (about 6 or 7 as
>> far as I can imagine). Note that the way in this picture would be
>> classified quite differently for each vehicle type (pedestrians, and
>> maybe bikes to some extent can do just fine on it, but not
>> wheelchair).
>>
>> I would tag this one as this:
>>
>> surface=asphalt
>> tracktype=grade1 (grade2 says unpaved-only and says nothing about potholes)
>> smoothness=very_bad
>> mtb:scale=1
>> sac_scale=T1 (or maybe T2)
>> wheelchair=limited
>>
>> But I think different people would disagree on whether we should
>> render that as a 'good' or a 'bad' road. The potholes would likely be
>> temporary in many countries, but not so much in others.
>>
>> So maybe the renderer should consider all tags except surface and draw
>> the way as 'bad' if it is ever bad for someone (car, pedestrian,
>> cyclist or wheelchair user).
>>
>> On Fri, Jan 3, 2014 at 11:26 PM, Dave Swarthout <daveswarthout at gmail.com> wrote:
>>> Now that is a bad road, even though it's paved. Before reading anything in
>>> this thread I would have applied the tags surface=asphalt,
>>> surface_condition=rough_less_than_40 kph (used 1232 times).
>>>
>>> Now, I'm not sure what I'd do ;-)
>>>
>>>
>>> On Sat, Jan 4, 2014 at 8:19 AM, malenki <osm_ at malenki.ch> wrote:
>>>>
>>>> Fernando Trebien wrote on Fri, 3 Jan 2014 17:56:15 -0200:
>>>>
>>>> >- people don't seem to agree on which tag to recommend overall to
>>>> >  describe surface conditions: tracktype, or smoothness, or simply
>>>> >  surface
>>>>
>>>> OSMers seem to agree that they need all of them.
>>>>
>>>> * Tracktype at least for more or less unimportant tracks,
>>>> * Surface for the material of surface of the road
>>>> * Smoothness at least for ways whose smoothness doesn't match the
>>>>   smoothness one would expect when looking at the surface=value
>>>>
>>>> How else would you describe an asphalted road like this?:
>>>> http://geoawesomeness.com/wp-content/uploads/2013/10/lidar1.jpg
>>>> (from
>>>>
>>>> http://geoawesomeness.com/application-of-mobile-lidar-on-pothole-detection/)
>>>>
>>>>
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>>>
>>>
>>>
>>>
>>> --
>>> Dave Swarthout
>>> Homer, Alaska
>>> Chiang Mai, Thailand
>>> Travel Blog at http://dswarthout.blogspot.com
>>>
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>>>
>>
>>
>>
>> --
>> 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)



-- 
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)