[Tagging] Feature Proposal - RFC - trafficability

[BGNO BGNO]

Isn't smoothness also based on some form of interpretation?

Cheers,
BGNO


2014/1/4 Fernando Trebien <fernando.trebien at gmail.com>:
> 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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