We showed you significant updates to Google Maps which leaked early this morning, and Google just announced updates to Maps at Google I/O.

Google also announced that its Maps API is used by over 1 million active sites and accessed by 1 billion unique visitors weekly.

Maps will now feature a 5 star rating system for locations across all platforms. Users can now swipe across results in a simple, gesture user interface. Zagat reviews are now more prominent with badges and cards simplifying its appearance. These cards now include a new Offers experience with partners including Starbucks.

Google Maps for Mobile also includes improvements to rerouting in transit and explore features. Google Maps for iPad was demoed during the keynote, which we expect to see with the iPhone update this summer.

Maps on the desktop now includes a new fly-in view for supported locations, which is like a  street view for specific landmark interiors. Public transit information on the desktop is now comparable side-by-side with standard transit and now features a new schedule view.

Google Earth is now viewable on the desktop without an additional download or needed plugins, which brings immersive 3D mapping to the desktop.

You can sign up for the new desktop Google Maps today.