<http://schema.org/description>
"Vector maps in iOS 6 are so efficient that Apple can cache a very large surrounding area for offline browsing and GPS navigation when traveling outside of WiFi or mobile data coverage."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/12/10/05/apples-new-ios-6-maps-support-automatic-offline-use-for-a-wide-area>