Is there a way to change the map data for the Android Google Map API?

Use OpenStreetMaps, like you suggest. There are 18 applications that integrate with OpenStreetMaps already.

Osmdroid now can be used as a library to provide similar functionality to Google Maps, but using OpenStreetMap data instead. code.google.com/p/osmdroid.

Unfortunately the core of the OS is still closed - this includes the modules like Google Maps". No, the core of the OS is open. Google Maps is an application and SDK add-on that is closed.

– CommonsWare Mar 30 '10 at 14:55 My bad, I was unaware of that. – Seidr Mar 30 '10 at 14:57 Most of the rest of what you wrote is correct -- I just wanted to comment on the "core of the OS is still closed" portion. – CommonsWare Mar 30 '10 at 14:58.

While the Android OS is toted as an open operating system, unfortunately the core of the OS is still closed - this includes the modules like Google Maps. While I guess it could be possible by using your HOSTS file to rewrite where Google Maps queries for its data, you would still have to reverse engineer how the application retrieves the data, and then you would have to output your own data in place. Really, I think that sounds pretty messy, and not the most ideal hack.

If there is a way to do this, I'm not aware of it on the Android. If I recall correctly this was possible on the iPhone by manipulating the cached map tiles, but retrieving map tiles from another source, not possible as far as I know.

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