Google has released its state of the art 3D maps program for iOS.  It released its version for Android in June.  The iOS maps are available for all 14 regions that are currently available for Android.
Google plans on adding more regions before the end of the year.

The process Google uses to produce the maps is an interesting one.  They conduct fly-overs of metropolitan areas; photographing it from many different angles.  Then they combine high-res imagery with local geometry to create 3D tiles that users can look at from any angle.

The release comes months before Apple’s anticipated release of its own 3D maps program for iOS.

cNet reports that in addition to the 3D capability, the iOS update has a “tour guide” feature that lists places of interest.

The maps really do look cool.  Check out cNet for links to map views.