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 ...

Google has quietly added elevation data to bike routes in its Maps service, providing better intel for intrepid cyclists. The feature, which launched Friday, seems to work for much of the U.S. and ...

Accurate elevation maps are essential when calculating microwave paths over rugged terrain or the impact of mountains, hills and even buildings when predicting TV coverage. Much has changed since I ...