Hi, I don't know the region myself so I am limited to anecdotal evidence as found on the web:
* Montevideo clearly brands itself as having "a coast" (from welcomeuruguay.com: "Costa de Oro" (Gold Coast) is the name given to the great variety of beaches stretching from La Barra de Carrasco, in Montevideo, to Solís Grande Creek, ...) * next city east is called "Ciudad de la Costa" * Buenos Aires, on the other hand, seems to be mainly referred to as being "on the SHORE of Rio de la Plata" * Wikipedia entry on Montevideo calls Rio de la Plata an "arm of the Atlantic ocean" It is obvious that, regarding the official definition, both countries have a shared interest of defining the coast as far out on the sea as legally possible. Therefore, I am not sure if our usual approach of "letting the locals decide" will work here. Our other usual approach is that of "truth on the ground" and the 200km+ straight line from Punte del Este to Cabo San Antonio certainly stretches *anybody's* definiotion of a coastline! The largest estuary in the United States, Chesapeake Bay, is almost completely mapped as coastline, only changing to a natural=river polygon very far inland - though I haven't researched currents or salinity. Are there other examples of large bays/estuaries? Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging