NASA has created a "Global Selfie" photomosaic comprised of over 36,000 individual photographs taken on or around April 22, 2014, also known as Earth Day. After several weeks spent sorting through the more than 50,000 images submitted – some of them were presumably not suitable for a family audience – the end result is a 3.2-gigapixel image that users can scan and zoom to view the individual photos.
The goal of the project was to promote environmental awareness and highlight NASA's ongoing efforts to protect the blue marble we all call home. To this end, the space agency invited people around the world to go outside on Earth Day, snap a "selfie" and share it on Twitter, Instagram, Facebook, Google+ and Flickr with the #globalselfie tag. Images were posted by people from 113 countries and regions and from every continent – including Antarctica.
Some 36,422 individual images were then used as pixels on views of each hemisphere captured on Earth Day 2014 by the Visible Infrared Imaging Radiometer Suite instrument on the Suomi National Polar-orbiting Partnership (NPP) satellite. However, it should be noted that the individual photos do not match up with their geographic location of origin. Otherwise, large swathes of the planet would be left blank.
If you submitted a pic for the project, you can try and find yourself in the zoomable image that is hosted on the GigaPan website.