Features of the iPhone Maps App
Find your current location with Maps.
Tap the Maps icon and then tap the show current location button, the little gray arrowhead shown in the margin and found in the lower-left corner of your screen.
A pulsating blue marker indicates your current location on the map when the phone’s GPS is used to find your location. In addition, the Location Services indicator, an arrowhead, appears to the left of the battery indicator in the status bar.
If GPS is not being used because you’re out of the satellite’s sight line, a somewhat larger pale blue circle shows your approximate location. Either way, when you move around, the iPhone updates your location and adjusts the map so that the location indicator stays in the middle of the screen.