[Tagging] Help required on tagging a "wadi"

Christoph Hormann chris_hormann at gmx.de
Mon Sep 5 10:55:12 UTC 2016


On Sunday 04 September 2016, Greg Wickham wrote:
> 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?

If there is verifiable intermittent waterflow you should tag it 
waterway=stream + intermittent=yes or waterway=river + intermittent=yes, 
possibly also seasonal=no if waterflow occurs sporadically and not on a 
regular seasonal basis.

If you are unsure if there has been continuous waterflow in recently 
times at all you should not tag it with the waterway key at all.

If there is a visible track used to drive on a regular basis this should 
be mapped separately as highway=track - the track will not be identical 
to the streambed center everywhere.

Note not every route that has been used by a vehicle is to be tagged 
highway=track, it has to be used on a regular basis and the route needs 
to be geometrically defined (i.e. cars use the same route as the ones 
before).  For example these are not hundreds of highway=track:

http://mc.bbbike.org/mc/?lon=2.940453&lat=29.503374&zoom=14&num=3&mt0=bing-satellite&mt1=mapnik&mt2=google-satellite


-- 
Christoph Hormann
http://www.imagico.de/



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