It’s funny the way close observation can change your perception of things. Heisenberg’s uncertainty principle says something like this about observing quantum particles [1]; maybe borderology needs its own uncertainty principle. Consider: What is the longest straight-line international boundary? Why, that has to be the American-Canadian border between Lake of the Woods (Minnesota/Manitoba) and Boundary Bay (Washington State/British Columbia), which runs for 1,260 miles along the 49th parallel north. Right?
Nope. It may look that way on a world map. But zoom in close enough and it turns out that the straight line running along the 49th parallel north is not really on the 49th parallel north. And it isn’t straight. Like, at all. Marked by a 20-foot strip of clear-cut forest, the border may seem straight as a ruler. But as it zigzags from the first to the last of the 912 boundary monuments erected by the original surveyors, it deviates from the 49th parallel by up to several hundred feet.
