Ever wonder what it would look like to plot every single geotagged tweet since 2009 on a map? Twitter has done just that.
Twitter posted these maps of Europe, New York City, Tokyo and Istanbul on its blog Friday. They use billions of geotagged tweets: Every dot represents a tweet, with the brighter colors showing a higher concentration of tweets. It's pretty amazing how the mapped-out tweets clearly match with population centers, highways and the like -- though perhaps that's obvious.
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5 Terrific Twitter Mapping Tools
1. Europe
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2. New York City
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3. Istanbul
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4. Tokyo
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More of Twitter's geotagged maps are available on Flickr. What do these maps reveal to you? Share in the comments.