If you’ve ever wondered how these giant world-wide high-resolution maps come together, Wired has a great new article with the creators of “MapBox”. MapBox is taking continuous streams of satellite data from the likes of NASA to construct giant near-realtime images of the entire globe at staggering resolutions.
“For the new release we’re processing two years of imagery, captured from January 1, 2011 through December 31, 2012,” says Loyd, “this amounts to over 339,000 16-megapixel+ satellite images, totaling more than 5,687,476,224,000 pixels. We boil these down to a mere 5 billion or so.”
The first problem is even getting the data. It’s all available in the public domain, but just transferring it over to MapBox’s servers was a major task because of the volume. To do this render, they needed to download two thirds of a terabyte of compressed data. “We’ve got 30 to 40 servers pulling down data from NASA,” says Herwig. “We called them up and said, ‘hey we’re going to hit you hard, what’s the best way we can do it for you?’”
