> De: "Alan Mackie" <aamac...@gmail.com> > Para: "Tag discussion, strategy and related tools" <tagging@openstreetmap.org> > Enviados: Sábado, 1 de Agosto 2020 13:26:06 > Asunto: Re: [Tagging] Rio de la Plata edit war
> On Sat, 1 Aug 2020 at 07:21, Paul Norman via Tagging < > tagging@openstreetmap.org > > wrote: >> On 2020-07-31 8:21 a.m., Andy Townsend wrote: >>> On 26/05/2020 00:20, Alan Mackie wrote: >>>> Has this edit war stabilised? >>>> Apparently it has been blocking coastline updates across the whole world >>>> for >>>> months now. >>>> https://osmdata.openstreetmap.de/data/land-polygons.html >>>> https://github.com/fossgis/osmdata/issues/7 >>> (picking this thread up again because there still hasn't exactly been a >>> meeting >>> of minds here) >>> land polygons have been generated (see >>> https://osmdata.openstreetmap.de/data/land-polygons.html ) and >>> https://github.com/fossgis/osmdata/issues/7 has been resolved by manually >>> "releasing" the coastline. The current situation in OSM is >>> https://overpass-turbo.eu/s/WD8 - at the time of writing this the coastline >>> crosses the river north of Buenos Aires. >>> However, edits are continuing (see >>> https://www.openstreetmap.org/changeset/88787419 ). I'm not convinced that >>> moving to one of two extremes, even a small amount at a time, is a good idea >>> until there's actually been discussion between the proponents of the various >>> positions. >>> For what it's worth, neither extreme position looks the best answer to me - >>> looking at the salinity change between river to ocean at >>> https://www.sciencedirect.com/science/article/pii/S0307904X07000716 (see >>> https://www.sciencedirect.com/science/article/pii/S0307904X07000716 for the >>> key >>> picture) and looking at >>> https://de.wikipedia.org/wiki/Datei:Rio_de_la_Plata_BA_2.JPG suggests a >>> location some way between the two. Despite the NASA photo it looks like >>> there >>> isn't a "step change" in salinity - and of course values will fluctuate >>> based >>> on winds and tides etc >> I live near the coast and have done coastline processing, including a great >> deal >> worldwide during the redaction. >> Salinity and territorial control have seldom been considerations in where the >> break between water mapped as waterway=riverbank and natural=coastline that I >> have seen. The break is chosen as a convenient place for mappers and a common >> view of where the coast of the ocean is, not based on scientific salinity >> criteria. For territorial control, look at all the inlets along the BC or >> Norwegian coasts. > Perhaps I am an overly literal follower of the wiki, but I had always assumed > the coastline should continue inland as far as the tide continues to be > noticeable. Mediterranean mapping might be an issue, but elsewhere I think > this > is fairly clear? > If the water is fresh or the waterway still appears to be a river, canal etc, > then it seems reasonable that they should also have those tags as well. The > coastline and riverbank tags aren't fighting for a common key, so it's not a > direct tagging conflict. > As for territorial control, there are archipelagic states with territorial > waters despite large gaps between all their islands. I'm not sure why inlets > or > bays pose a problem? there is no noticeable tides. tides here are meterological, not astronomical. e.g the river between Buenos Aires and Colonia is 3m depth average, with a few channels to navigate. if you are not cautious, with a change of wind the water withdraws and your sailboat remains in the mud without notice. Regards, M. --------------------------------------------------------------------------------------------------------------------------------------- Con el nuevo beneficio fiscal, tu facturación electrónica puede ser sin costo. Informate si aplicás aquí. mvdfactura.uy ---------------------------------------------------------------------------------------------------------------------------------------
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