On Jan 17, 2015, at 4:47 AM, Richard Z. wrote: > in principle yes. We need a value to indicate that surface water is > intermittent or rare but there is a persistent underground waterflow > following the riverbed which is a frequent feature of wadi's (unlike > washes where this seems rare) > > Richard >
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. 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? Tod _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
