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Here's an interesting map I made of tweets (You must login or register to view this content.) around the world. I recorded 2.9 million tweets over the course of 2-3 days. Red pixels indicate locations where at least one tweet was made.
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No, I didn't. Looks like I used the same map as one that they offer, but I did it myself using PHP and the GD library. The background is a publicly available image from NASA's Blue Marble I believe; I snagged it from Wikipedia.
The following user thanked magglass1 for this useful post: