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CLOUDCATCHER

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 * Collect

Spot the clouds in satellite images to help us validate our computer generated
cloud detector.
Learn more


GET STARTED

So you think you are a lean, mean, cloudspotting machine? Got only a few minutes
to spare? Try 'Catch that Cloud', our simple, quick-fire workflow, designed for
PC, mobile, tablet and on the go. Go global to view images from around the
world, or view scenes from the UK.

Catch that Cloud: UKCatch that Cloud: Global

3 people are talking about CloudCatcher right now.

Join in
CloudCatcher Statistics

0% Complete
1,782
Volunteers
17,651
Classifications
7,126
Subjects
0
Completed Subjects

WORDS FROM THE RESEARCHER

"When I'm looking at these beautiful satellite images on my computer, I think I
could actually be sitting in the ISS staring out the window! The research that
we do is helping to improve our understanding of the Earth's climate."

ABOUT CLOUDCATCHER

We love seeing clouds in our satellite images. They look beautiful. But if you
are interested in making measurements of the surface you need a clear view of
it. Clouds can spoil our data and so they need to be identified in the images so
we know which pixels to discard. To do this, we have an automated ‘cloud mask’
which identifies which of the image pixels are likely to contain cloud. Often
the cloud mask gets it right, but no cloud mask is perfect and there are times
when cloudy pixels are missed, or indeed clear sky gets falsely flagged as
cloud. It is important to understand how well we are doing at identifying this
cloud, which is actually tricky to do.

We ask the question, just how accurate is our cloud mask? Help us to answer this
by identifying the clouds in the images. You are so much better at catching
clouds than our computers are, so we could really use your help.

EXTERNAL PROJECT LINKS

 * Project Webpage
 * cloudcatcherproject
 * @CloudCatcherPrj

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