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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...
This is a great little animation that shows changes in county boundaries, but the available data files are a treasure for historical geographers!
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I am interested in US History and watching the creation of the boundaries with the year that they were created gives a lot of insight into the people and population of that time. Also the rate of change in size from year to year gives insight into the economic and political status of the country at that time. This is a great clip to watch even if just to see how much the country has physically changed over time.
I love animation maps. Great for getting students interested in learning.