On Sat, Aug 23, 2014 at 02:52:41PM -0700, Tod Fitch wrote: > So which is the preferred tagging? > > If waterway=wadi then I have some OSM editing to do but at least the renderer > should be easy. If waterway=stream, intermittent=yes then I need to get some > changes done by the project who's rendering database I am using. >
Wadi is something different than a wash. While not easy to state objectively, some hints are * wash tends to be shorter and steeper, they often run out in alluvial fans as soon as they get into flat areas. Some collect into intermittent rivers though. * the wash-valley form will be merely a deepening from erosion and often quite young and quickly changing ( in the order of decades or hundreds of years ) * when a wash is dry there is no water flow close underneath the surface * wadi will be longer, perhaps 10km or much more * the valley is older, has gone through several geological stages of riverbed formation * even in dry seasons there will be often underground water, places with swamps or pools and distinct vegetation. Richard _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
