On 6 August 2018 at 02:48, Robert Szczepanek <rob...@szczepanek.pl> wrote:
> W dniu 05.08.2018 o 12:23, Volker Schmidt pisze: > >> Flood marks and high water marks are not necessarily the same thing. >> Read >> https://en.wikipedia.org/wiki/High_water_mark >> to get the gist. >> There are ordinary high water marks (and I suppose also the opposite, >> ordinary low water marks) which are based on the regular tides in the area. >> A flood mark would be a marker for the water level reached in certain, >> particular events. >> I am not sure about terminology in different jurisdictions, but the >> concept seems to be clear to me that there are two different things we want >> to tag. >> > > I would like it to be so: > - flood marks as flood signs, > - highwater marks as tide signs. > But even in recent scientific papers this division is not so clear. > > Another issue is that from the beginning, on OSM wiki > https://wiki.openstreetmap.org/wiki/Key:historic > mark related to floods is described as > historic=highwater_mark > > What would be the optimal tagging solution from OSM point of view? > > regards > Robert I would think a good start would be changing the wiki to make it historic=flood_level, leaving any reference to high (or low) water to be a waterways thing ie the high tide mark. Thanks Graeme
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