2011/8/24 Bryce Nesbitt <[email protected]>:
> On 08/23/2011 06:49 PM, Martin Koppenhoefer wrote:
>> If you are doing an import you should check beforehand if there is
>> already a drinking water fountain in OSM mapped to avoid duplicates.
>
> I do a proximity check


that's good to read


>: however there is a problem in that legitimate
> drinking fountain spacing can be far smaller than normal GPS or air photo
> resolution.  The proximity conflation can produce false results.


yes, it is not completely rare that there is more then one fountain
close to each other.


> It is usually impossible to pick out the fountains on even the best air
> photos (and OSM does not have the best air photos).


Sure, and it impossible to get the type from any imagery I have seen so far.

Another issue that might be important for you: amenity=fountain
(drinkable=yes) is also a variant to look for. See here:
http://wiki.openstreetmap.org/wiki/Tag:amenity%3Dfountain

cheers,
Martin

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