On Mon, Mar 21, 2011 at 2:18 PM, M∡rtin Koppenhoefer <dieterdre...@gmail.com> wrote:
> In all cases where the sidewalk is not perfectly parallel, or where > you want to add barriers between the sidewalk and the road, you will > in any case have to move to the other scheme. > > IMHO explicit sidewalks have the huge benefit of simplicity. I know > that many of you are computer scientists eager to create the most > elegant way to model all kind of complex situations with pure > mathematics, but don't forget that we are building the people's map: > the easier it is to contribute (and to understand the model) the more > people can actually map. +1 I've mapped sidewalks as highway=footway. It makes sense to do that when you're mapping a park, when mapping a walking area in a community (eg townhouses), but most areas which are paved and designated pedestrian areas in an urban or suburban area are directly associated with a road. In my case, I see a city full of street data, where most streets have a sidewalk. I want users to be able to map those sidewalks quickly and easily, as Martin says. But beyond that, I don't see a good solution to routing without the sidewalks tags on the road way. Are there other ways to accomplish the same task? Sure. You could create a separate way which is the sidewalk, tag it with all the appropriate tags, then create a relation which has both the road and the sidewalk. The problem is that while relations are more "correct", it's hard to execute. I can explain to a new mapper that if a sidewalk exists, tag the street "sidewalk=yes", it's much harder to show them how to create the second way, tag that way, then to create a new relation, move the appropriate tags (like name) from the road way to the relation, etc. sidewalk=yes is a single step, and I have the code to make it a dropdown in PL2 (JOSM is forthcoming). To create the relation in order to get the routing right is a multistep process and it's hard to make smooth. >> My problem with your answer is, that tagging at the main street is hard to >> expand to explicit mapping later. > > > Yes, most likely we would remove these tags and draw explicit ways later. You could do this, or let sidewalks be rendered, but not explicit ways. - Serge _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
