Doug McCune uses San Francisco Police Dept. crime reports to map crime in that city as altitude. Narcotics:
Various criminal activity:
What would an altitude map of Halifax crime look like?
Or better still, a North American altitude map of multiple sclerosis, a disease that concentrates in northern latitudes (with Nova Scotia a likely mountain range)? Any data-and-graphics-savvy medical researchers out there want to take this on?
Hat tip: Flowing Data.