After 10 years I think my absence of a mathematical education has finally come to hurt me in a programming setting. I need to calculate the distance between two points on Earth using a Great Circle ...

An underrated feature in Google Maps is the ability to measure the distance between two or more points. It can aid tremendously with planning, whether you’re aiming to walk or go on a road trip.

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Most of us have pushed our luck when it comes to stretching out a tank of gas to the point where the dreaded low-fuel light pops on, calculating in our heads how many miles to the next gas station vs.