Hacker News Reader

Would be interesting to run a ton of queries in a gridlike fashion, and use the resulting polygons' areas to graph a map of mobility.

What is a mobility map ?

I don't know, I guess I could tautologically define it as a map that shows how far you can get from every point in a given timeframe.

Sort of a "heatmap" of distance.

That way you could discover the most "well-connected" locations within a city, and even potentially use that data for urban planning.