Get my new weekly sketch in your inbox

Join over 30,000 people learning something new in a moment each Sunday.

Isochrones illustration: An aerial view of London shows enclosed concentric, but irregular shapes, radiating out from the centre of the city, denoting areas of equal travel time; from 5 minutes to 30 minutes.


From the prefix iso meaning equal and khronos meaning time it literally means equal times. And whereas maps are usually put together with lines of equal distance you can either construct maps, or overlay maps as here, with lines of equal time. The overlay view gives you time contours rather than, say, altitude contours. Handy for checking things like commuting distance. I like how you find little islands where there is fast transport in and out like trains or planes.

You can explore time maps of London at mapumental.

You’re welcome to use and share this image and text for non-commercial purposes with attribution. Go wild!
See licence

Buy Me A Coffee