The taxi data just has startpoint and endpoint correct? So the route in between each trip is just a guess? Edit: Whoops, from the about page: > The raw data

The taxi data just has startpoint and endpoint correct? So the route in between each trip is just a guess? Edit: Whoops, from the about page: > The raw data include only start and end locations for each trip. These points were run through Google's Directions API to create the routes shown in this visualization. Of course, these are Google's best choice, not necessarily the one the taxi took.