Look at retail wifi uses throughout the country.
Large retails have the capability of tracking individual users through their cell phone.
Register that number with the retailer, and they can tailor coupons to you.

From what I understand, it takes a robust infrastructure, and the APs aren't exactly cheap.

I suspect it is not so much triangulation, rather tracking AP range, and where the user connects, and spends the most time connected to individual APs.

I've see it in articles - but never paid attention, as it is out of my budget; mission scope; and service parameters for offering wifi for browsing.

James Gilbert, BS, MLIS
Systems Librarian
Whitehall Township Public Library
3700 Mechanicsville Road
Whitehall, PA 18052
610-432-4339 ext: 203

-----Original Message-----
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Carol Bean
Sent: Monday, January 19, 2015 2:07 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] Wi-Fi location triangulation

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  

--
Carol Bean
Sent with Sparrow (http://www.sparrowmailapp.com/?sig)


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])
> >  
>  
>  
>