Ever tried taking two or three or ten photos and stitched them together to make a panoramic view? Here is
an extreme panoramic photo taken at Delft University by a company called TNO.

modern consumer cameras can easily take a picture with 5 million pixels. ... This one is with 2.5 billion pixels - that's 500 times more pixels. If this photo were printed, it would measure 6.67 m by 2.67 m (300 dpi).