[Tagging] River crossing grade

[Warin]

For some river crossings in Australia OSM would then have the value 
'swim' on crocodile infested rivers.. that is NOT a good idea! And yes 
people have died at some of these crossings by crocodile.


I see no reason not to simply state a water depth.. even inaccurate it 
will give a better idea than 'swim', 'wellies' etc.


for tidal ..example depth at high_tide=x, depth at low_tide=y


On 27/1/22 09:44, Timothy Noname wrote:
> Last summer I visited Lopwell dam which is a River ford at low tide 
> and about 6ft deep at high tide.
>
> https://maps.app.goo.gl/NYWvnVfeqzSMbhbN8
>
>
> There is also another ford further down stream which is virtually 
> impassable for anything but a proper 4x4 or tractor,
> https://maps.app.goo.gl/TACQSMDdw9dUR18GA
> (interesting to watch on YouTube though.)
>
>
> If I were to tag Lopwell dam ford I would like to give it a max value 
> of swim and a minimum value of wellies.  The foot bridge by its side 
> is broken but once it's repaired would have a min value of dry and a 
> max value of swim or wade.  This would provide useful information to 
> anyone planning a journey.
>
> On Wed, 26 Jan 2022, 20:53 ael via Tagging, 
> <tagging at openstreetmap.org> wrote:
>
>     On Wed, Jan 26, 2022 at 06:30:37PM +0000, Philip Barnes wrote:
>     > On Wed, 2022-01-26 at 18:13 +0000, Timothy Noname wrote:
>     >
>     > Tidal is certainly an unusual thing for a ford, I have seen one
>     or two
>     > but most roads affected tides are causways and the general rul
>     is you
>     > do not travel on them if they are covered with water. Tide
>     implies salt
>     > and I would certainly not drive one no matter how shallow the
>     water is.
>
>     Well, I know of one dubious case in Cornwall:
>     https://www.openstreetmap.org/way/270055625
>     is an historic ford crossing the West Looe River which is just about
>     tidal at that point. It was incorrectly mapped as a bridge
>     some years ago: I have no idea how that could be so wrong, but then
>     I have surveyed near there several times, and presumably the "bridge"
>     was from armchair mapping.
>
>     I can just about imagine a local farmer crossing in a large tractor
>     when the water is very low, but I have seen no sign that there is any
>     modern use. Streetview seems to have got a bit of the track leading
>     there: https://goo.gl/maps/9JeA6d6WN7Mbn72V6
>
>     Anyway, there can be genuine fords which are tidal, even if this
>     particular example is disused.
>
>     ael
>
>
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