| Is this the picture?
 The caption read:  "False hopes: Google said the grid-like markings, thought to reveal the location of mythical underwater city Atlantis, are an artifact of its map making process.  But for a few hours this week, experts hoped the riddle may finally have been solved.  More than six hundred miles off West Africa and more than three miles down lay a mysterious grid of lines that resembled the streets of a city."
 
 What is interesting is what type of a mapping process artifact would yield the observation?
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