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

I went to a museum where they used a different approach.

At each location, the phone user texted a code to a number, and received a text message.

Perhaps you could do something like that.