Google licenses most of it's imagery from several sources, including the USGS, which (anyone can download for free) and DigitalGlobe. The combination of online maps, satellite and aerial imagery and real estate have spawned some fascinating and...
However, don't forget that Google licenses most of it's imagery from one of several sources including the USGS (anyone can download for free) and DigitalGlobe and they are not the only ones working with the real estate industry or power sites that...
Dept of Defense Image Collection, and other sources inclding Orbimage and DigitalGlobe. Over the weekend I went searching for Hurricane Katrina imagery in the Google Images and Yahoo Images databases.