I don't know. Square state boundaries, the Mason-Dixon Line, and so forth, all are at constant latitude, which I suppose technically counts. At an angle that isn't 0 or 90 degrees? I dunno.
Actually, you were correct with the Mason Dixon line! It's not a parallel of latitude. Wikipedia explains it (http://en.wikipedia.org/wiki/Mason-Dixon_line) and uses a luscious couple diagrams. Rhumb lines were more common among nautical charts so they used one to settle the north-south border. Besides, they didn't have GPS yet.
Also interesting from that page is the Twelve-Mile Circle. Didn't you ever wonder why Delaware has an arc for a border? The highest point in Delaware is on that arc, by the way. Delaware is the state with the second-lowest highest point, 448' above sea level. (Florida has a lower one, 346', in Dalton County on the Alabama border.)
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syntheid
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Date: 2008-06-02 12:56 pm (UTC)no subject
Date: 2008-06-02 02:05 pm (UTC)no subject
Date: 2008-06-02 02:07 pm (UTC)no subject
Date: 2008-06-03 12:28 am (UTC)Also interesting from that page is the Twelve-Mile Circle. Didn't you ever wonder why Delaware has an arc for a border? The highest point in Delaware is on that arc, by the way. Delaware is the state with the second-lowest highest point, 448' above sea level. (Florida has a lower one, 346', in Dalton County on the Alabama border.)
I am giddy and exhausted. I will stop writing.
no subject
Date: 2008-06-02 10:07 pm (UTC)