So there you are wandering around not knowing precisely where you are. Help, where am I?!
Well, thanks to modern technology there is hope. Locating your exact position so that you can conduct matters as expected, efficiently moving on like you never could have imagined, knowing the surroundings and taking advantage of the many possibilities, that's what it is all about.
This is because Web map service a.k.a. WMS comes to the rescue. Nicely said, you know where you are, that's the important thing for now.
For more detailed and interesting information, you might want to check out Ambient Findability.