Maidenhead Grid Locators
Among Amateur Radio operators, a popular way of describing one's
location is to give the 4 or 6-character grid square designation.
Each grid square is 1 degree of latitude by 2 degrees of longitude
(4-character) or 2.5 by 5 minutes (6 character), and has a unique designation.
A variation of this system was first devised in Maidenhead, UK, hence the
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