I want to create a little app and am curious as to whether it is possible.

I want to create a simple phone app that once activated (or while activated) will broadcast the cell phone's location so that other people in the room would know that person is running the application as well as know where that person is relative to them. Can this be done? If so, how good can you get in locating someone -- could I tell if someone was within 3 feet versus within 30 feet?

As an example app, it would be interesting to be in the room and be able to look at the phone as see relative location:

locator.png

Has anyone seen code to do this?

Thanks!