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. 2017 Feb 7;8:14238. doi: 10.1038/ncomms14238

Figure 5. Five largest clusters predict North-South US geography across multiple generations.

Figure 5

In a, each circle gives the mean latitude (in degrees) of all pedigree birth location annotations within a given generation linked to genotypes assigned to each of the five clusters; end points of vertical bars represent 10th and 90th empirical percentiles. These statistics are compiled from pedigree annotations with US birth locations only. Note that ‘0 generations ago' refers to genotyped individuals. For contrast, b shows the same statistics, but for longitude instead of latitude. Each degree of longitude or latitude is roughly equivalent to 100 km. Examples of US cities by latitude and longitude include Boston, MA (42.4, −71.1), New Orleans, LA (30.0, −90.1) and Sacramento, CA (38.6, −121.5).