With VoiceOver, you can zoom in or out, select pins, and get information about locations.
Use the rotor to choose zoom mode, then flick up or down to zoom in or out.
Touch a pin, or flick left or right to move from one item to another.
With a pin selected, double-tap to display the information flag. Flick left or right to select the flag, then double-tap to display the information page.