Today in the US it is Independence Day, often referred to as simply the 4th of July. Banks are closed, BBQs are being heated up, and fireworks will fill the sky for most of us today.
Speaking of firewoks, here’s a neat post I found from Rick Klau a few years ago, when he used Google Earth to determine if he’d be able to view a local fireworks display from the comfort of his home.
He determined that fireworks typically reach a height of 300m, so he drew a polygon to that height, then used Google Earth’s terrain feature to see if the polygon was visible from his house. It was, and they enjoyed a great show that evening!