> The flood prone areas are not designed to let you cross a river Yes. I think that is exactly the important point and a very good description/criterion. flood_prone=yes for things that are _not_ designed to be flooded. And waterway=*, ford=* … for things that _are_ designed/expected to be flooded. Lukas Sommer
2015-01-20 4:09 GMT+00:00 johnw <jo...@mac.com>: > I think using flood_prone on places designed to handle water (like a ford) > is incorrect. The sections of a freeway that are closed off during flooding > (a lane is closed because storm waters cannot properly drain away, or > cuttings under train crossings with flood level markers because the road > floods - both are flood prone, but their job isn’t to let you cross a > waterway. > > Fords can be dangerous to cross in storms, but their job is to let you cross > in the presence of water. The flood prone areas are not designed to let you > cross a river, they just end up being flooded because of inadequate > drainage. > > a ford https://goo.gl/maps/aBWlg > > flood prone (with a warning sign with lights when it is flooded) > https://goo.gl/maps/9aFXV > > doesn’t seeing a ford automatically mean it’s flood prone? it handles river > crossings ^_^ > > Javbw > > > On Jan 20, 2015, at 8:38 AM, johnw <jo...@mac.com> wrote: > > Some part of road have > concrete parts that are flood_prone during cyclone. > > How can we (or not) extend it to roads? > > > > access:conditional = no @ flood > > > I'm using flood_prone=yes. With surface=concrete. > > But I was looking for some method to unify intermittent aspects of rivers > and roads that are related when roads are crossing river or vice versa. > > > > > the ford=* key might be useful. They suggest to also tag depth=0 if it is > usually dry year round. I think this is the tag you are looking for, > especially since the road section is designed to be submerged (the concrete > sections) which means it is a ford (as emergency or very large vehicles, > like a bulldozer, could still cross on the road). > > > In San Diego, there are several large roads that are built with fords, as > access lost during flood conditions is merely an inconvenience. > > I think this applies to any roadway *designed* to let you cross a river by > going through it, even if it is low/dry most of the time (otherwise, > floodwaters would easily destroy the crossing). > > Also, because of the wadi problem, i will be making up a new “wash” proposal > - as it seems wadi is completely generic now. > > > Javbw > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
