When this came out, back in 2012, there was a decent amount of discussion about it here https://news.ycombinator.com/item?id=3416426 https://news.ycombinator.co

When this came out, back in 2012, there was a decent amount of discussion about it here https://news.ycombinator.com/item?id=3416426 https://news.ycombinator.com/item?id=3416426 . As I recall, this Slate article drew a lot of attention to the map, and garnered many sales for the years of work that went into making the map.