WAYFINDING DISPLAYS.

Magnetic north It’s on the move (and so, of course, is magnetic south). Below, a gyrocompass shows navigators the direction of true north.

Photograph © Eugene Sergeev/123rf

Compass roses Every printed map has one of these.

They’re also often seen set into sidewalks.

Photograph © Antonio Balaguer Soler/123rf

A Swedish atlas from the 1960s puts people and animals at their compass positions.

Directional t-shirt  Redbubble has some attractive compass t-shirts. Dress like a cartographer: goo.gl/VmMkGb

GPS What did we do before we had it? The basis of the Global Positioning System is 24 satellites at an altitude of 12,000 miles (19,300 km), and often supplemented by the Russian GLONASS system for increased accuracy.

Diagram by Paulsava.

In-flight entertainment Airlines feed us all kinds of geographical information. This is from an Iberia Airbus A340, flying the JFK to Madrid route.