[Tagging] Mapping a negative
bryce2 at obviously.com
Tue Nov 15 06:42:26 GMT 2011
On 11/08/2011 09:19 PM, John Smith wrote:
> On 9 November 2011 16:12, Bryce Nesbitt<bryce2 at obviously.com> wrote:
>> I've run into a curious use of a tag, to map the lack of a thing.
>> At least that's what I think mappers are doing.
>> One might normally expect a well, mountain hut, highway rest area, or toilet
>> to offer drinking water. Some mappers have placed:
>> To indicate the normal expectation is wrong.
> All the signs round here have potable yes/no depending if it's safe to
> drink or not.
describes a condition of a facility, not the lack of a facility.
Is a possibility, but then why call it drinking water? Why not then
have a more generic water tap which may or may not be potable:
volume=large (e.g. replaces
Are there any other OSM conventions that indicate a /lack/ of a
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