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30-second animation of the changes in U.S. historical county boundaries, 1629 - 2000. Historical state and territorial boundaries are also displayed from 178...
What I find to be the most interesting aspect of this animation is that each fluctuation of the border has a story behind it. You could teach a really interesting class on just those small changes, and why they took place.
I love animation maps. Great for getting students interested in learning.
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