[Tagging] Tagging estuaries: estuary=yes or river=estuary?

[Dave Swarthout]

I live in Alaska and the tidal range there is huge, 28 feet (8.5 meters)
with the spring high tides. Also, Alaskan rivers are usually so remote that
one has no good way to even estimate how far the high tide extends upriver.

On Sat, Oct 26, 2019 at 6:25 PM Iago Casabiell <iagocasabiell at gmail.com>
wrote:

> This is a very complicated subject, made even more compliclated because
> the coastline is only mapped in high tide. Intertidal zones are huge.
> There's a proposed tag to map the low tide coast:
> natural=mean_low_water_springs.
> (
> https://wiki.openstreetmap.org/wiki/Proposed_features/Tag:natural%3Dmean_low_water_springs
> )
>
> I think a key for a generic term for a river mouth is needed, extending
> beyond natural=coastline, wich should reach upriver to where the high tide
> crawls.
> Also there should be a specific tag for each type of river mouth: estuary,
> fjord, ría, delta, etc.
>
> I live in Galicia in NW Spain where the tidal range is above 4m and tiny
> rivers open into huge well defined bays called rías. I've been mapping them
> as bays in these last few months and there is still much work to do
> extending natural=coastline upriver, drawing natural=mean_low_water_springs
> and defining each type of natural=wetland contained in the ría. Check it
> out and you'll see it's complicated, and also see why this new tagging is
> very important.
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-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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