HOW TO: Estimate distance from Dan Conover on Vimeo.
Unless you had a great scoutmaster or spent some time in the military, odds are you never learned this little trick for converting routes on a map to a measurable, straight-line distance. I say that because of all the people I've shown this trick, none of them had ever heard of it before.
And it works -- an easy, reliable way to figure out the distance from Point A to Point B.
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