The Japan Atomic Energy Agency made the map by having a survey team drive through the area in June. The team took readings of aerial radiation once every 10 seconds for several days along routes totaling 17,000 kilometers.
The map uses colors to indicate radiation levels and Google Earth technology to help users pinpoint locations.
The agency says the map is more detailed than those that show radiation levels based on data taken from high in the skies. For instance, it shows two sites that are only 100 meters away but whose radiation levels differ by a factor of 10.
Thursday, August 18, 2011
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