[Tagging] waterway=wadi problem

[Richard Z.]

On Sat, Jan 17, 2015 at 07:50:36AM -0800, Tod Fitch wrote:

> 
> Based on where I sometimes see old wind driven pumps, I'd guess that many longer (10s of miles long) washes have an underground flow.

I think so.
 
> On the other hand, in the field or using Bing imagery neither I nor any other typical citizen mapper can really determine if there is unseen underground water flow. So so how can that be a criteria for mapping the feature?

usually you will assume it if there are ponds of open water or swamps 
in several places along a valley.

Richard