Am Mi., 20. Nov. 2019 um 11:35 Uhr schrieb Markus <selfishseaho...@gmail.com >:
> On Tue, 19 Nov 2019, 04:43 Joseph Eisenberg, <joseph.eisenb...@gmail.com> > wrote: > > Doing this for every intersection between a path and road, or lower > > classification road with a high classification road, would be a large > > amount of extra work for mappers, so it should only be done if there > > is no other way to get this information. > > However, this is a bit different with ending sidewalks or steps that > run parallel to the road: tagging the connection with the road > highway=footway + footway=sidewalk or highway=steps would pretend that > there were an abrupt change of the direction of the sidewalk or steps > by 90°, which is a bad representation of the actual geometry (example > [1]). Besides, continuing steps up to the highway=* way would distort > the steps, which is especially problematical with short steps and a > wide road. For example, continuing highway=steps of 4 steps with a > length of 35 cm each to the centre of the road that is 8.4 m away from > the last step would let you assume that one step is 2.45 m long > (example [2]). the issue with steps being represented too long is not related to the proposal of adding a specific subtag. I generally map highway=steps only for the (approximated) actual projection of the steps (first to last riser of each steps part) and add highway=footway for the landings and for the connections on the bottom and top. If you want detail, a step_count is also useful (add it to the single parts for a good representation). This gives generally a better representation as compared for example this one next to your first example: https://www.openstreetmap.org/way/86205958 The method still somehow fails for standard rendering when the steps are particularly flat, e.g. 1 meter horizontal for every riser but regular step frequency (I add flat_steps=yes, but it is not very diffuse). Another issue for 3D stems from situations, where there is both, steps which are also inclined (but may not be so many), so step_count represents them not so well (seems less steep than it is). Cheers Martin
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