Friends, I was attempting to do some pedestrian routing on the High Line (the elevated park in NYC, see Wikipedia for background) and noticed some oddities about how it was mapped on OSM. Quickly, this is a former elevated train viaduct that has been converted into a popular park in Manhattan. Since this is a popular area, I thought I'd ask the community first. Things I've noticed:
1. There is a 'building=yes' way for the entire elevated portion, including many of the supports that hold the platform up. This is pretty cool, and probably looks neat in 3D. There are some building overlaps, where the line goes through some buildings. https://www.openstreetmap.org/way/37054313 1a. The building also has the park tagging, which doesn't show up on the map when tagged to the same way (apparently). 2. There are two parallel ways on the northern part of the park, one for the former railway, another for the path. I believe that these should be merged or at least share points. The former railway IS the pedestrian path, so no need for parallel ways, right? https://www.openstreetmap.org/way/46481094 2a. https://www.openstreetmap.org/way/305761607 3. Stairs like this should connect to the street. https://www.openstreetmap.org/way/305761606 4. The 'highway=pedestrian' portion is not tagged as a bridge, which it is, arguably. But then, if the viaduct is a 'building', is it actually a bridge? I think it should be tagged as a bridge for cartography purposes. 4a. The 'highway=pedestrian' way does not have a name. The building does, but that doesn't render well. Named ways should be named, right? 5. There are several 'highway=pedestrian' areas like this one. Is there a better tag for open space like this? https://www.openstreetmap.org/way/277945794 6. Things get really crazy with the building passages. https://www.openstreetmap.org/way/277885773 7. There are a few oddities about the paths extending out from this node, all these crossing ways are hard to comprehend. https://www.openstreetmap.org/node/2823299563 Local mappers have clearly spent a lot of time on this, anyone have any feedback about how this could be mapped better, if at all? Best, Elliott
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