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 di

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.