[Tagging] question: best practices for micromapping ped areas and footpaths?

Greg Troxel gdt at ir.bbn.com
Wed Dec 31 18:00:11 UTC 2014

johnw <johnw at mac.com> writes:

> 1)  there are large open concrete areas for pedestrians, but there are also covered walkways through them as well. 
> http://www.openstreetmap.org/edit#map=19/36.38380/139.07281
> I mapped the open sections as highway=pedestrian+area=yes, while I
> traced the covered walkways (that connect the bus shelters) and tagged
> it as building=roof & highway=footway
> I'm not sure if I should just create single area of highway=pedestrian
> and put the building=roof over it or what. Also, the roof doesn't
> render as a building, but as a white pedestrian area. I think if it is
> tagged at building=roof, I should ask -carto to render it as a
> building, but it logically remains a footpath as well.

Given that there are specific places intended for walking, I would
create ways for them and tag those as highway=footway.   Then an area
for the roof, and another area for the entire pedestrian area.

The point of having separate ways is twofold:

  there really are paths that are more important than the broad area

  renderers and navigation programs that don't cope with areas will
  route people along the paths.  Which even if there is an area, will
  seem natural to the people

(Arguably, translating OSM to devices that lack concepts of routable
areas should add implicit paths from every area/way junction to every
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