Travel Times in Helsinki

Lauri Vanhala wanted to figure out the best place to buy an apartment in Helsinki, so he built an interactive sort-of-isochrone map of the city. He explains: “I calculated the travel time from every address to every other address in Helsinki around 7:30-8:00am (about 30 billion searches total!). Then I calculated the (weighted) average travel time to anywhere in the city, using amount of jobs in the target area as weight.” [OSM]

1882 Isochrone Map of France

Cameron Booth (of Transit Maps fame) posted an 1882 isochrone map of France showing travel times from Paris by rail to Twitter and boy did it ever go viral. He’s planning on selling a print of it on his online store.

Road Trees

The Road Trees project has produced animated isochrone maps showing road networks erupting fractally from a single departure point.

An isochrone in a map shows with the same color all points from which it takes the same time to arrive to a specific location.

We chose 10 locations around the world and for each of them constructed the isochrones on top of the road network of the corresponding country. Consequently, we plot these isochrones using a dynamic color palette representing the diffusion from the location of interest to any other point of the road network.

Unexpectedly, we found that the isochrones follow beautiful fractal patterns, very similar to networks shaped in the Nature by rivers, veins, or lightnings.

[Stephen Smith]