Hi, Talin from Trulia. The times are calculated with a simple Djikstra's traversal, implemented in the open-source pgRouting (pgrouting.org) Our existing loca

Hi, Talin from Trulia. The times are calculated with a simple Djikstra's traversal, implemented in the open-source pgRouting (pgrouting.org) Our existing local information pages were already using google maps, so we didn't go out of our way to create new base maps just for this visualization.