[talk-ch] Pls, don't delete sidewalks, visual impaired people might use them

amilopowers at u-cloud.ch amilopowers at u-cloud.ch
Fri Aug 25 13:45:51 CEST 2017


IMHO sidewalks as footpaths make sense where a roundabout or similar is.

Like here: http://www.openstreetmap.org/#map=19/47.13245/7.24645

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An 24. Aug. 2017, 23:12, marc marc schrieb:

> Le 24. 08. 17 à 21:56, Marc Gemis a écrit : > when you can better tag a sidewalk with a separate line, why not ? If a see a sidewalk and a street (2 way separated from each other with a space between both), I tag them as such. if I see a street with 2 lanes, I tag one way, lane is a characteristic of the path like its surface or its width. I see one way with a lane for car and sidewalk for pedestrian, I tag one way highway=residential + sidewalk=both No one agrees to divide a two-lanes road into two ways because it breaks the routing despite geographic precision would be better. I don't understand why we sometimes do the opposite with sidewalk. Blind user have no problem to find the limit between a raised sidewalk and a street. Create a disconnected sidewalk where it is not the case has a low utility due to the fact that a gps have a low accuracy. But break the routing could make a blind user to cross where you can't. In the example of the list talk, depending on the algorithm used, the user had the choice to cross anywhere without knowing whether it is possible or not or walk 100m and walk on the street next to the artificially disconnected sidewalk. The 2 are worse than 5m inaccuracy. Therefore we must do things in a good order : 1) have a tag or relation with a meaning "This sidewalk is separated for geographical precision, but for routing, it is permanently connected to the road". 2) Have at least one routing algorithm that can use it. 3) It is only afterwards that one can draw the sidewalks separately without sending the people into a dangerous situation. _______________________________________________ talk-ch mailing list talk-ch at openstreetmap.ch http://lists.openstreetmap.ch/mailman/listinfo/talk-ch
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