Isn't smoothness also based on some form of interpretation? Cheers, BGNO
2014/1/4 Fernando Trebien <[email protected]>: > How about using smoothness:condition or ford:condition for that? > > On Sat, Jan 4, 2014 at 9:42 AM, Wolfgang Hinsch <[email protected]> > 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 >> [email protected] >> 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 > [email protected] > https://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
