Apple has filed a patent for "podmaps".
Apple's podmaps patent describes the "Creation, Management and Delivery of Map-based Media Items,".
"According to one aspect, personalized media items can pertain to generation and delivery of map-based media items. These media items are playable by a media playback device. For example, when a map-based media item is played by a media playback device, an audio output and/or a visual output can be provided. The audio output can be provided by digital audio, and the visual output can be provided by at least one digital image that is associated with at least a portion of the digital audio," the patent abstract explains.
The company seems to be focused on developing a solution that would enable users to access complete directions and maps using a portable device.