knitted landscape

What is the process behind google earth capturing scans of the earth? 

How is an image/scan of a landscape knitted together for a viewer to experience in 3d (google earth street view)? 

How will photogrammetry influence the way photographs influence the  understanding of objects? 

Is a photograph a replica of something, or is it a container of information? 

Is there a limit to information and the method in which something is contained?