[Tagging] key covered=* applied to storage tanks

[António Madeira]

The main issue is not closed water tanks. That can be a default in OSM.
The issue here is how to inform that a storage_tank is open.
Mind you that there is an infinitude of storage tanks types, but for 
firefighting, those are almost exclusively made in concrete and are open 
for the reasons I stated before.

In my opinion, the cover=* key is the most adequate in these situations, 
because there's no way to define what the roof/coverage of these storage 
tanks would be if they had one.
Stating that a an emergency storage tank is covered=no informs that it 
can be accessible from above.
If, for example, we state that it has a roof=no, you're defining a 
specific kind of covering, when it has none and you have no way to know 
if that would be a roof, a tarp, a shed, etc.



Às 07:22 de 12/01/2023, Volker Schmidt escreveu:
> I would say that storage tanks, as default, are closed. So a 
> man_made=storage_tank in OSM is closed.
> Secondly if a tank is closed (at the top), this is called a roof. 
> There are fixed roofs and floating roofs.
> See as an example this manufacturer's web site: 
> https://www.wermac.org/equipment/storage_tanks_vessels_general.html
> So this would translate to roof=yes/no/floating/fixed in OSM speak to 
> indicate that a tank is closed-
> covered=yes would be correct to indicate an open or closed storage 
> tank under some separate kind of covering structure.
>
> Il giorno gio 12 gen 2023 alle ore 09:28 Warin <61sundowner at gmail.com> 
> ha scritto:
>
>
>     On 12/1/23 08:28, António Madeira wrote:
>     > Open tanks are common in wild fires territories, like in
>     Portugal, and
>     > I'm probably in Spain and Greece.
>     Not in Australia.
>     > They're used by helicopters and firefighters, who depend on them in
>     > heavy mountainous regions, where it's impossible or very
>     difficult to
>     > get water.
>
>     Helicopters here use rivers, dams, not tank water.
>
>     Firefighting trucks here use tank water, and they have to pump it out
>     thought a hose to a nozzle, so contaminates can be a problem.
>
>     > We're talking about water tanks of all sizes and formats, some
>     of them
>     > are really huge, which are only used for fight forest fires, so it
>     > doesn't matter if they're contaminated.
>     > For helicopters, they're marked with white and red stripes, so that
>     > they can be easily spotted from the air.
>     > Some of them rely on rain water to be filled, but most are
>     refilled by
>     > firefighters with river water or other sources.
>
>
>     Tanks here as a first option take rainwater. If necessary then water
>     would be trucked in. In remote areas with no population there are no
>     tanks so trucks would have to suck water from anywhere. In rugged
>     remote
>     areas there are probably no roads!
>
>     Remote areas here with populations have extremely large tanks for
>     drinking water... that can be used for fire fighting. Extremely
>     large =
>     at least a years water supply with no rain fall.
>
>     >
>     >
>     > Às 05:54 de 11/01/2023, Warin escreveu:
>     >>
>     >> On 10/1/23 03:49, António Madeira wrote:
>     >>> Greetings.
>     >>>
>     >>> There are closed and open storage tanks, and I think is
>     important to
>     >>> differentiate them, specially those used by firefighters and
>     rural
>     >>> communities to fight wild fires.
>     >>> The approved proposal for the key covered=* states "C. denote an
>     >>> area such as an underground parking lot, a covered
>     reservoir/cistern
>     >>> or even such things as an aquarium (e.g., Kelly Tarlton's,
>     Auckland,
>     >>> NZ), when the covering is not a man-made structure that would
>     allow
>     >>> layer differentiation."
>     >>>
>     >>> I would like to know what the community thinks about elaborate
>     that
>     >>> line a bit more, to include emergency storage tanks so that
>     people
>     >>> know it's ok to add covered=* to those structures.
>     >>>
>     >>>
>     >>
>     >> Storage tanks around me are all covered, at least all the one I
>     >> remember are. This includes ones used or emergency fire fighting.
>     >> Uncovered ones would be very rare in my country due to the
>     >> possibility of contamination by drowned animals, dirt, dust, tree
>     >> leaves and tree limbs. There are probably regulations about them
>     >> being covered to prevent the breading of mosquitos! So would think
>     >> covered is part of being a storage tank at least here.
>     >>
>     >>
>
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