11.3. Use Location Services and Compass in Maps

As an example of Location Services in action, let's briefly consider how to find your location in Maps. To do so, tap the Current Location button ( ) in the lower left. The button turns bright blue and, after a brief wait (anywhere from a few seconds to a minute or so), Maps shows your general location via a circle centering on your approximate location; the smaller the circle, the greater the confidence in the accuracy.

On an iPhone 3G and 3GS, if GPS tracking is accessible, a small, pulsing blue marker also appears, indicating your presumed precise location (Figure 11-2).