[Tagging] Flood mark or high water mark

Dave Swarthout daveswarthout at gmail.com
Sun Aug 5 23:01:16 UTC 2018


> 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.

+1

Very sensible IMO.

On Sun, Aug 5, 2018 at 2:59 PM Graeme Fitzpatrick <graemefitz1 at gmail.com>
wrote:

>
>
> On 6 August 2018 at 02:48, Robert Szczepanek <robert at 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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>


-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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