On Mar 22, 2011 12:19 PM, "Peter Wendorff" <wendo...@uni-paderborn.de> wrote: >
> Slightly disagree here: > A sidewalks is a lane for a pedestrian in a low-traffic residential road. > Towards a young child I would define a sidewalk as a way - the child should not cross the street otherwhere than at marked and much as possible secured crossings. A way doesn't represent or correlate with a road. A way is just an ordered list of nodes. What is represented by a way is entirely determined by tags. I think some other issues are being brought into this discussion which IMHO are separate. First, this proposal doesn't supplant, replace or effect other proposals. I think that the sidewalk tag can live in harmony with other tags and standalone footways in the same way atm=yes doesn't proclude there being an amenity=atm tag. Secondly, I think that the issue of routing is getting confused with common sense and law. If there's a wall as a barrier then people will not drive into it. Similarly, if there is traffic, people will not run into the street to cross the road. Third, there's seems to be an undercurrent of "correctness" in this discussion. Let's remember that OSM is largely focused on topological consistency. We want to get the most data in OSM as possible and we can iteratively improve things. The problems we as a community encounter are largely when we make something complex for folks to map. > A wheelchair user will interpret the sidewalk as a separate way, not a lane, as long as there is a curb higher than a specific treshold - and that's the case nearly everywhere, where no marked crossing or at least a driveway to a house is located. Also, let's remember that a wheelchair user isn't brain dead. It'd be great to map those ramps, etc. but that's not something found on most commercial maps, so we'd actually be ahead of the game. > I know: A healthy, perhaps a little bit tired of life adult will cross the street wherever he wants; but a local car driver will also use the street where we objectively have to tag access=destination to have a shortcut. > But is that really a lane? Doesn't that indicate the sidewalk being a dedicated way? Its not a lane; it's a feature of the road, just as we have tags for roads lined with trees. Yes, you could also argue it's a separate way, etc., but in my mind, a pavement along the sides of a road is a sidewalk; and thus a road feature. >> and adding a separate highway=footway indicates that there is a barrier between the footway >> and the road. > > There is! Ask the next wheelchair user or old man/woman with a walking frame about the barrier a curb of normal height is for him I don't understand your point here. It sounds like you're concerned that people who are mobility impaired will have trouble, but right now there's very little data, so there's no way for them to get into trouble, since the routing software won't tell them to go anywhere. :) In other words, let's try to do the simple thing, get the data in, and then we can see what people want to do with it later. - Serge
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