Yeah,  This article (http://journal.code4lib.org/articles/5859) talks about locating and tracking staff in a library, but it uses Androids with a phone app built for the purpose.  

Carol  

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Carol Bean
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On Monday, January 19, 2015 at 05:52, Cary Gordon wrote:

> It shouldn’t be impossible, but it would be tricky. Normally, users connect to one access point at a time. To locate a user would require connecting to two or three. I am sure that there is some utility library to do this, but it would need to be incorporated in an app and loaded on the user side.
>  
> Cary
>  
> > On Jan 18, 2015, at 7:24 AM, Fleming, Jason <[log in to unmask] (mailto:[log in to unmask])> wrote:
> >  
> > Has anyone used Wi-Fi to determine a user's position within the library to help them zero in on a book's location using their mobile browser?
> >  
> > I've seen a number of interesting articles and posts, but haven't come across any actual use cases. I'm wondering if all the metal shelving in a library would make this impossible?
> >  
> > Jason Fleming
> > University of North Carolina Wilmington
> > [log in to unmask] (mailto:[log in to unmask])
> >  
>  
>  
>