On Tue, 2010-11-30 at 11:43 -0500, Anthony wrote: > On Tue, Nov 30, 2010 at 11:29 AM, David Murn <da...@incanberra.com.au> wrote: > > On Tue, 2010-11-30 at 15:30 +0000, Ed Avis wrote: > >> As a rough rule, leisure=park and landuse=grass could be considered > >> walkable, > >> unless tagged access=no or access=private. > > > > You may also find timed access restrictions apply. Some parks here for > > example, are gated off at night, which again may affect vehicle/bicycle > > traffic but not foot traffic, or it may affect everything. > > Fortunately, there are tags for all of this: > > http://wiki.openstreetmap.org/wiki/Access#Transport_mode_restrictions > http://wiki.openstreetmap.org/wiki/Access#Access_time_restrictions > http://wiki.openstreetmap.org/wiki/Barrier
Thats great, what happens if someone traces the park from aerial imagery, and doesnt know/care about any of those? Or for that matter, if someone tags it on-the-ground, but doesnt add all the details? What defautls should routers use? Should they assume all parks are flat and walkable, or should they assume theyre fenced, or that theyre 'stay off the grass' or 'stay on the grass' or what? This is the problem. A way on the map, shows there is a right of passage. If theres no way in an area, it might mean the area is passable, but it might also mean it hasnt been mapped. Hence, the safest option is to not route unless theres a right of way to follow. David _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
