Find closest longlat: http://stackoverflow.com/questions/17275825/how-to-find-the-closest-lat-and-long-in-a-text-file
Tufte in R: http://www.motioninsocial.com/tufte/#discussion
=YEAR(A1)&"-"&IF(LEN(MONTH(A1)) = 1, "0"&MONTH(A1), MONTH(A1))&"-"&IF(LEN(DAY(A1)) = 1, "0"&DAY(A1), DAY(A1)) |