Google

 

By 2011, Google will have a constellation of twenty-three satellites in orbit. Most, if not all, will be equipped with high-resolution cameras. Using a combination of satellite imagery and high-resolution aerial photography, Google Earth offers reasonably high-fidelity images of just about anywhere you’d like to go. In a matter of moments, you can go from a topographical overview of the entire planet to a reasonably detailed examination of the roofs of a favela outside Rio.