Then you could even pick *two* points in map and see their intersection in time period, which was great for finding places to meet friends.
Even cooler are distance cartograms, where the map distorts according to travel time.
https://riatelab.github.io/distanamo/articles/web_only/with-...
Then you could even pick *two* points in map and see their intersection in time period, which was great for finding places to meet friends.