The new museums include the de Young Museum in San Francisco, the Philadelphia Museum of Art, Cincinnati Museum Center, the Indianapolis Museum of Art, the American Museum of Natural History, and 17 Smithsonian museums. Google plans to add more museums to Google Maps over time.
With indoor maps, Android users will be able to navigate through the interior of these buildings with or without a cell phone signal. No update is required to access these new indoor maps. According to Google, the interiors of more than 10,000 structures can be explored from Google Maps.
Indoor Maps is available for your Android 2.2 or above device in Google Maps for mobile version 6.0 or above.
Google Maps 6.9 features off-line maps which are available only in phones and tablets running Android 3.0 and higher. If you have GPS enabled on the device, the blue dot will still work without a data connection so you know where you are, and if your device has a compass you can orient yourself without 3G or WiFi connectivity. The My Maps functionality lets you mark locations, add details like photos and links, and invite others to collaborate. It’s free.
Open Street Maps Android (Osmand) is an opensource navigation application with access to a wide source of popular open street map data. All map data including vector and raster maps can be stored on the phone memory card for offline usage. Osmand also has online routing and audible guidance.
OffMaps 2 has offline maps for iPhone & iPad. It uses OpenStreetMap. For $0.99, the app allows you to download two maps of your choice. It has offline maps for thousands of destinations, both in the U.S. and internationally.
Once you have downloaded a map you can download the corresponding Wikipedia content for free. The Wikipedia content contains the most important 200 articles about a region or city that are geo-referenced along with all images that are geo-tagged.