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a Google spokeswoman said:
what users are seeing is an artefact of the data collection process.… Bathymetric (or sea floor terrain) data is often collected from boats using sonar to take measurements of the sea floor.… The lines reflect the path of the boat as it gathers the data. The fact that there are blank spots between each of these lines is a sign of how little we really know about the world’s oceans.
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