On 29.03.19 07:05, Warin wrote: > https://wiki.openstreetmap.org/wiki/Proposed_features/Area-steps
Detailed steps would be great for 3d rendering, so I'm very interested in the topic as a data consumer. However, reading the proposal leaves me with open questions. Could you describe the intended logic for constructing the geometry of the individual steps from an area_steps relation? I can think of several good heuristics myself, but the notable "same number of nodes" rule makes me think you have something specific in mind. I do have some concerns regarding ease of mapping: - I'm not convinced that a relation (rather than an area:highway polygon) is necessary in typical cases. Usually, the most acute angles of the polygon mark the point where the bottom/top border is separated from the side border. It would seem sufficient to draw explicit lateral ways only in cases where that assumption doesn't hold. - Requiring the same number of nodes for the upper and lower way seems very fragile. It's unexpected that inserting nodes into a way (or removing them from a perfectly straight line) would invisibly break data. Also, you suggest that different step_count values for the left and right side could be modelled using your relation. But I don't see how I could tell whether the steps are "missing" from the top or bottom? Tobias _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
