Ever wonder how these GPS devices get their information? Yes, there is actually a dude driving around the US mapping it for you, and we tag along to see how it’s done.

read more | digg story

Update – 03/12/2013
You’re looking at an ancient post shared from Digg. At some point Digital Trends moved to WordPress, the above link is now available here: Mapping the Roads, One Off-Ramp at a Time.