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I really like that site. Have used it multiple times to find dark spots for photographing the milky way. However, I don't understand why the default overlay is from 2015, when there is newer data available. First thing I usually do is switching to the most recent overlay.



There are VIIRS maps and World Atlas 2015 map. They show fundamentally different things. VIIRS shows you sources of light pollution while World Atlas shows you how these sources of light impact the sky above you.


Thanks for the explanation!




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