How about using smoothness:condition or ford:condition for that? On Sat, Jan 4, 2014 at 9:42 AM, Wolfgang Hinsch <osm-lis...@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 > > > > > _______________________________________________ > 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
