Microsoft has announced the completion of their Global Ortho Project aimed at collecting very high resolution imagery for the United States.
The company said:
With the Global Ortho project, the Bing Maps Imagery team set a new standard in aerial map imagery by collecting every square inch of the Continental United States and Western Europe at 30cm resolution (1 foot = 1 pixel) in just two years – something that had never before been accomplished. This project has given us imagery that is brilliant, accurate and fresh, and the completion of the U.S. is a huge achievement!