Locate an iPhone reliably indoors?

Question

I\'m writing an app for a museum tour. I\'d like my app to know where the user is in the building, if the user is standing in a particular room, in front of a particular work, e

Answer 1

Here's a ridiculous idea: set up speakers around the building emitting high pitched pings beyond audible range. Each speaker would emit a unique sound which can be identified and triangulated.

With enough DSP it just might work. I'd feel sorry for any dogs and cats and teenagers in the vicinity though.

Or you could try deploying your own GPS stations -- but I'm willing to bet that you'd get a visit from men in black trench coats arriving in an unmarked van.