Great-circle distance

Showing the way they went

A short introduction to this album.

A hot air balloon journey

An insight into the planning that goes into a hot air balloon journey and also how maps can be produced through filming from a hot air balloon.

Spherical geometry

This track shows us how a hot air balloon is produced and how the application of spherical geometry is imperative when planning a round the world flight, and what programmes and software packages are used to make these calculations.

Looking for Theta

Through a complex example, we learn how journeys are measured when the points are not on the equator and how this is calculated using Theta.

Great-circle distance

Great-circle distances might be the shortest way to travel, but they are not always the easiest. We also look at how lines of latitude aren't great-circles and that permission must be acquired to fly over many countries.