When you think of Google Maps, you often only associate it with how to get around new cities. However, it's filled with secret features that you probably did not know about. In fact, did you know that ...

Can you explain how to interpret a course elevation map? I’m trying to get a better understanding of a marathon I’m running this fall that looks intimidating on the chart, but there is no mention on ...

Google Maps now features elevation profiles for bike routes. Google added biking directions to Google Maps and specialized maps that highlight bike routes a few years ago. If you are weak like me, ...

Thank you to GEB reader ‘DJ’ for suggesting this idea in the comments of our post on simulating lakes. It turns out that the algorithm for drawing contours given a regular array of altitude data is ...