photomaping technique needed

hi everyone i ve been hunting the web for a good theory on this issue of "photo-mapping" can any one tell me exactly what are the tools needed to implement this??
any theories are welcomed....
thanks
Harsh

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please explain navigation system

Hi guys, this is the 1st post on this forum and have been expecting a lot from the experts over here, while i was going thru this site , the question "what is the logic behind the navigation system?" hit me and it hit me hard, i was thinking over it

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