"The trucks would drive along every San Francisco street using the lasers to measure the dimensions of buildings, to create a 3D framework onto which digital photos can be mapped. This would complement the mostly top-down view of San Francisco available through Google's Keyhole satellite photo application. The goal is to create similar 3D online versions of other cities in the US and overseas."
Screenshots of some 3D maps have also been captured.
Thanks to Slashdot