[Tagging] key:drinking_water for OSM ways

[Joseph Eisenberg]

The tag content=water has been used over 24,000 times (mainly with
man_made=storage_tank, sometimes with man_made=reservoir_covered),
while content=drinking_water has only 62 times, so I would use
content=water for storage tanks and reservoirs.

I agree that the drinkability of a storage tank of water is not
readily observable, and that drinking_water=yes is generally used for
features that provide drinking water, rather than merely containing
it, as stated on the wiki page for that tag.

- Joseph Eisenberg

On 2/21/20, European Water Project <europeanwaterproject at gmail.com> wrote:
> And maybe it shouldn't be mapped that way because it is not observable.
>
> Up for discussion...
> Thanks,
>
> Stuart
>
> On Fri, Feb 21, 2020, 08:25 Warin <61sundowner at gmail.com> wrote:
>
>> On 21/2/20 6:16 pm, European Water Project wrote:
>>
>> Hi Warin,
>>
>> contents=water seems more appropriate
>>
>> That does not stipulate if it is drinking water.
>>
>>
>> Thanks,
>>
>> Stuart
>>
>> On Fri, 21 Feb 2020 at 07:38, Warin <61sundowner at gmail.com> wrote:
>>
>>> So a water tank with drinking water cannot be tagged as drinking water
>>> because there is no local access. Fine.
>>> Then it is only tagged as a tank with contents=water, or should there be
>>> yet another value for it contents=drinking_water?
>>> Or a sub tag water=drinking water...
>>>
>>>
>>> On 21/2/20 5:10 pm, European Water Project wrote:
>>>
>>> Hi Martin,
>>>
>>> There are a couple of issues I see with drinking_water=yes not having a
>>> concept of access.
>>>
>>> 1. Where is the observability  ? How can I know if a water tank has
>>> drinking quality water or just agriculture quality water ?
>>> From the wiki :
>>> "One can assume that the water is pure when many people drink it every
>>> day."
>>> This is hard to assume, and one would never know if there is water ...
>>>
>>> 2.   But there is an even bigger issue --- and I will admit that I am
>>> biased because of the European Water Project's use case.
>>> For a map feature to be useful, it should have universality. Ie. if one
>>> maps restaurants with toilets, at least customers should have access ...
>>> Someone who goes to the OSM way where there is a water tank, even with a
>>> wallet full of cash, will die of thirst before getting a drink.
>>> It's similar to toilet=yes ...   A restaurant with a toilet for
>>> employees
>>> only, probably shouldn't have the tag.
>>> Yes, there is an access tag, but in most cases access is implied.
>>>
>>> drinking_water = yes, seems to come with access in 99% of the 61,300
>>> nodes and the large majority of the 8,178 ways.
>>>
>>> Best regards,
>>>
>>> Stuart
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thu, 20 Feb 2020 at 19:33, Martin Koppenhoefer
>>> <dieterdreist at gmail.com>
>>> wrote:
>>>
>>>> Am Do., 20. Feb. 2020 um 19:14 Uhr schrieb European Water Project <
>>>> europeanwaterproject at gmail.com>:
>>>>
>>>>> Dear All,
>>>>>
>>>>> I have noticed that the the key drinking_water = yes for ways is
>>>>> sometimes used in a manner not described in the wiki.
>>>>>
>>>>> https://wiki.openstreetmap.org/wiki/Key%3Adrinking_water
>>>>>
>>>>> The issue has to do with ways which might store drinking water which
>>>>> is
>>>>> not actually directly accessible.  I think this tag should be for
>>>>> accessible water.
>>>>>
>>>>
>>>>
>>>> I don't read from the wiki description that the drinking water must be
>>>> directly accessible. It depends on the context feature.
>>>>
>>>> Cheers
>>>> Martin
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