[Tagging] Feature Proposal - RFC - trafficability

Fernando Trebien fernando.trebien at gmail.com
Sat Jan 4 12:06:17 UTC 2014


How about using smoothness:condition or ford:condition for that?

On Sat, Jan 4, 2014 at 9:42 AM, Wolfgang Hinsch <osm-listen at ivkasogis.de> wrote:
> Am Samstag, den 04.01.2014, 11:19 +0100 schrieb BGNO BGNO:
>> We don't have to stick to the term "trafficability". What would be a
>> good alternative?
>>
>> - usability
>> - passable
>> - passability (there is an abandoned proposal suggesting this term)
>> - usable_if
>> - ???
>>
>
> None of them.
>
> I think it's a bad idea to tag interpretations.
>
> You look at a road and see whether it's passable or not. But what do you
> see in reality? You cannot see any kind of usability, this is only an
> interpretation of you.
>
> You see obstacles? What obstacles? Water, sand, grave, rocks? What does
> this mean to all road users?
>
> You may have a well built motorway in a very good state. But for you
> it's impassable. Why? Well, you are taxiing an A380. Or you are going by
> bike or on foot.
>
> You want to cross a river? No bridge? No problem, you are driving a
> hovercraft. Or there is a bridge, but it is impassable because you are
> driving a tank and the bridge would collapse.
>
> Even if two people are going by the same class of vehicle, the way may
> be passable only to one of them.
>
> I know a mountain-biker who has fun if the way is a blind end in front
> of a river with a depth of less than 1 m, followed by 200 m of mud and
> 500 m of scrub before reaching the next way.
>
> Some people would describe the way up to Mount Everest or K2 as quite
> passable.
>
> These examples are extrem, of course. But when we were mapping for the
> bicycle map of Lübeck, we discussed how to tag the "quality of way".
> It's not possible, because you don't know which exact vehicle will pass
> and what kind of driver or walker comes along.
>
> You can create a map for a certain group of road users and interpret the
> tags of the ways according to your target group. But you cannot tag it
> in OSM because OSM has no special target group. OSM is for every class
> of vehicle, driver or walker.
>
> Please tag what is to be seen "on the ground". If the surface consists
> of mud, tag surface=mud (or any appropriate tag). If it's flooded at
> hight tide or monsoon season, tag flooded=high_tide,
> flooded=monsoon_season or something better, but don't tag
> hight_tide=impassable because I might be driving an amphibious vehicle
> and want to be routed through.
>
> Cheers, Wolfgang
>
>
>
>
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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)



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