A software developer and former engineer on the Android team at Google has been using maps to display tweets tracked for the last 3.5 years. But Eric Fischer isn’t just cataloguing a small, location-specific amount of data. He’s been looking at every single tweet that’s been geotagged.

“There are about 10 million public geotagged tweets every day, which is about 120 per second, up from about 3 million a day when I first started watching,” wrote Fischer on the MapBox blog. “And here is what those 6,341,973,478 tweets look like on a map, at any scale you want.”

Fischer was able to gather his data thanks to Twitter’s public API. He’s paying it forward, too, offering the tools and design info online for anyone to create their own maps.

Interestingly, Fisher notes that despite there being more than six million tweets only about 9 percent of them show up as dots on the map. The technology he used also allowed him to filter out duplicate check-ins that may have occurred over multiple platforms like FourSquare.

As you might expect, many of the tweets sent in Boston are from education, travel and entertainment hubs within the Greater Boston Area. Places like Logan Airport, South Station various hotels, and college campuses are illuminated in neon green, while the TD Garden, Fenway Park and Newbury and Boylston Streets are also densely lit.

Prior to working at MapBox, Fischer, who’s fascinated with geography-centric data to improve urban transit and pedestrian issues. His maps have appeared in the likes of “the Museum of Modern Art and have been published in Wired, Popular Science, Best American Infographics” and more, according to his employee bio.