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Google's World Sunlight Map

Cool beans. The cloud data is accurate.

The World Sunlight Map provides a computer-generated approximation of what the earth currently looks like. While less impressive than actually being into orbit, this is much more accessible to most of us.

I start with cloudless images of the earth during the day (from a pair of NASA satellites) and night (from a DoD program to map city lights). Every 3 hours, I download a composite cloud image based on data from weather satellites all over the world. And every half hour, these images are composited and mapped onto a sphere by xplanet according to the relative position of the sun. The flat maps are post-processed by ImageMagick to cut off the 15 degrees nearest the north and south poles where cloud data is unavailable.


Note: Wizbang Blue is now closed and our authors have moved on. Paul Hooson can now be found at Wizbang Pop!. Please come see him there!

  • Currently 3.2/5
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Rating: 3.2/5 (5 votes cast)


Comments (2)

BPG:

That's pretty neat.

ke_future:

damn, something we agree on, lee.


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Publisher: Kevin Aylward

Editors: Lee Ward, Larkin, Paul S Hooson, and Steve Crickmore

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