Have you ever been to Four Corners? It’s the only place in the U.S. where four states meet at one point. A few years back, there was some confusion over the position of a monument at Four Corners that marks this spot. Some reports claimed that the position of this marker was off by two and a half miles. Today, we’re revisiting a 2009 interview with Dave Doyle, chief geodetic surveyor from NOS’s National Geodetic Survey. As you’ll hear, Four Corners is exactly where it’s supposed to be -- and the reason for that is that surveying isn’t only about taking precise measurements with sophisticated equipment, it's also about history, technology, and law.