how to get distance using Wi-Fi

Question

I want to find the distance using wi-fi and plot the marker on map in iPhone.

So any idea or code i can get for that?

Answer 1

Using the recieved power you can work out the distance using a rf propagation model from an emitter to a reciever. However, it sounds like you want the location, not just the distance.

Free-space Path Loss Model:

http://en.wikipedia.org/wiki/Free-space_path_loss