Kevin Yang wrote:
> Hello ,
> 
>     i am trying to develop a mobile wikipedia product which utilize the 
> GPS data. I noticed that google maps have a button "more -> wikipedia" 
> which will show  wikipedia articles near a specific location .  I am 
> curious how that works?
> 
>     Any tips/answers are highly appreciated. Thanks.

Wikipedia articles are geotagted usint the template 
{{coord}}<http://en.wikipedia.org/wiki/Template:Coord>

Google maps parses the database dumps<http://download.wikimedia.org/> to 
extract the locations. It was explained on wikitech-l, see the archives.

You can also see other implementations, such as 
http://toolserver.org/~dschwen/wikiminiatlas/ on the toolserver and in 
general the related 
tools<http://toolserver.org/~interiot/cgi-bin/tstoc?sortby=hits&tag=geo>

The mediawiki api does not expose this data, but you may contact with 
para or Dschwen as to how to query their tools for your app.

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