On 9/10/22 21:49, Martin Koppenhoefer wrote:
Am So., 9. Okt. 2022 um 12:22 Uhr schrieb Minh Nguyen <m...@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 splithairs.+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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