[Tagging] Help required on tagging a "wadi"

[Greg Wickham]

In Saudi Arabia a wadi is a mostly dry riverbed that carries water very infrequently (maybe a couple of times year).

Within most sandy bottomed wadi’s is at least one track (typically 4wd).

The exact location of the track within the wadi will change due to occasional flooding events.

I’ve read the discussion summary at http://wiki.openstreetmap.org/wiki/Talk:Tag:waterway%3Dwadi <http://wiki.openstreetmap.org/wiki/Talk:Tag:waterway=wadi> but
I’m still not clear exactly how to tag this feature?

It seems:

	- waterway=wadi
	- intermittent=yes

is ok.

But how to indicate can be vehicle track?

Is it ok to mark a track in the “rough” vicinity (i.e.: the track path will change between flooding events)?

Should the wadi “line” be marked in the centre between the edges?

Would these tags be ok for a: “sandy bottomed wadi; 4wd only"

	waterway = wadi
	intermittent = yes
	highway = track
	tracktype = grade4
	4wd_only = yes
	surface = unpaved

Suggestions welcome.

   -Greg

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