On Wednesday 14 January 2015, Tod Fitch wrote: > [...] > > The United States Geological Survey (USGS) topographic maps will show > them as either a line of sand or an intermittent waterway depending, > I think, on whim of the cartographer.
USGS data distinguishes between intermittent, perennial and ephemeral: http://nhd.usgs.gov/userGuide/Robohelpfiles/NHD_User_Guide/Feature_Catalog/Hydrography_Dataset/NHDFlowline/StreamRiver.htm which well translates into OSM tags: intermittent: waterway=*, intermittent=yes, seasonal=yes perennial: waterway=* ephemeral: waterway=*, intermittent=yes, seasonal=no although i don't think past imports of NHD data have made this distinction. waterway=wadi can mean either intermittent or ephemeral or permanently dry, see also https://wiki.openstreetmap.org/wiki/Talk:Tag:waterway%3Dwadi -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
