Have you seen this Website yet? It’s called GeoSimPhilly. It’s a virtual 3-D Philadelphia!
“GeoSim compiles gigabytes of aerial photos, street images, laser scans and geodetic measurements of Philadelphia to build an accurate 3D city model, capable of providing a genuine life simulation of the physical streets, buildings and urban landscape with the “look and feel” of a real city.”
I’m pretty amazed by it and wonder what software they used to create it.