[Tagging] RFC - A broad look at fountains

[Warin]

On 9/10/22 21:49, Martin Koppenhoefer wrote:
> Am So., 9. Okt. 2022 um 12:22 Uhr schrieb Minh Nguyen 
> <minh at nguyen.cincinnati.oh.us>:
>
>     drinking_water=no is already approved for non-potable water, and
>     there
>     are non-Boolean values and drinking_water:legal=* if you'd like to
>     split
>     hairs. 
>
>
>
> +1
>
>     I'd expect that a tag for fountains and a tag for drinking
>     fountains would both imply a default value for drinking_water=* by
>     default, but the default should be overridden when more is known
>     about
>     the water source.
>
>
>
> a tag for drinking fountains should definitely imply drinking_water=yes,

Agreed. However there is a t least one case where a drinking fountain 
carries a sign that it is not suitable for drinking. Local drink form it 
anyway and don't seem to suffer from it. I'd tag it as 
drinking_water:legal=no and not tag drinking_water=* at all


> but amenity=fountain should not imply any default value for 
> "drinking_water", it should be checked and tagged explicitly. 
> Expectations change around the globe and while it could be approached 
> with national or regional defaults, I think it is better to be 
> explicit (because a missing value is not clear, can be default or 
> unknown, and potability of water is super important in this context).


I would take the safe view, drinking_water=no unless specifically tagged.


>
>
>
>     With a tag for water taps in general, it isn't as clear. But as a
>     data
>     consumer or user, I wouldn't be eager to assume that an outdoor
>     tap is
>     potable without more context. I've been to cemeteries in swampy New
>     Orleans that have taps signposted "Water for Flowers" and never once
>     considered that they might be hooked up to the municipal water system
>     and maintained to the standard of a public drinking fountain.
>
>
>
> yes, water taps on cemeteries, as far as I recall, have been the 
> initial reason for introducing man_made=water_tap (some people had 
> started mapping amenity=drinking_water drinking_water=no ;-) )
>

I'd still take the same safe view, drinking_water=no unless specifically 
tagged.

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