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Creating American Borders

30-second animation of the changes in U.S. historical county boundaries, 1629 - 2000. Historical state and territorial boundaries are also displayed from 178...

Via Seth Dixon, Susan Grigsby @sksgrigsby
Jesse Olsen's comment, March 16, 2013 1:04 PM
Betty Klug's curator insight, April 27, 2013 3:50 PM

I love animation maps.  Great for getting students interested in learning.

Samuel D'Amore's curator insight, December 14, 6:36 PM

This video does a fantastic job of showing how the United States has expanded and grown since its original 13 colonies. While many today might imagine that our nation was simply always this size in fact over many years of colonization, land purchases and land grabs America has eventually become what it is today.

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Puerto Rico endorses US statehood

Puerto Rico endorses US statehood | Thinking Geographically |

SAN JUAN, Puerto Rico — Puerto Ricans faced a fundamental question on Election Day: Should they change their ties with the United States?


Lost in the election day enthusiasm throught much of the United Statees was coverage about Puerto Rico.  A 'non-binding referendum' was on the ballot to reconsider the 114-relationship with the United States as a territory.  54% voted for a change, while 46% favored the status quo.  The second question was asking how to change that relationship: 61% voted for statehood, 33% endorsed a sovereign free association, and 5% for independence.  President Obama has gone on record stating that he'll support the will of a clear majority.  We'll see what this means, but we are a lot closer to 51 states than we've ever been before.  For more information, see Matt Rosenberg's assessment.


Tags: USA, political, states, autonomy. 

Via Seth Dixon
Jess Deady's curator insight, April 28, 1:45 PM

Page not found for some reason.

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Infographic: United States of the Environment

Infographic: United States of the Environment | Thinking Geographically |

Every U.S. state is No. 1 in some environmental category ... and No. 50 in another.


A fun map that can be used to discuss environmental issues at both the national and local level for American teachers. 


SV- Very intersting map.I was extremely suprised that Maryland of all places has the worst access to clean water seeing as it's on the coast. But, even though I'm not from there, I'm very proud of Alabama. As one of the "southern states" a common sterotype is having drunken rednecks/hillbillies everywhere... Who woulda thunk it?

Via Seth Dixon, Sheyna Vargas
James Hobson's curator insight, September 18, 10:39 AM

(North America topic 6)
Though this map may come across as rather bleak at first, in my opinion it really doesn't necessarily lay fault to the people that live in these states. In other words, some things mentioned on this map seem expected and, in a sense, acceptable to me. For example, California may have the most smog, but it cannot be entirely blamed on just the population (though even I can argue that *most* of it can). Major cities like Los Angeles and Sacramento are in low-lying valleys, which cause air masses to stagnate. If these cities were located in less-enclosed areas smog would not be able to built up as densely. 

In addition, I find fault with some of the categories. An example would be that of Florida having the most boat wrecks. Large ships have been traveling to/around Florida since the 1500s, and Florida has the longest coastline of all contiguous states. In this way it only makes sense that this is true. Perhaps a better research method would have been "most shipwrecks per capita". Similarly, "most CO2 emissions *per capita*" would have been a better categorization to consider. But then again, mapmaking is an art, not just a science, and perhaps another message is meant to be sent here...

Jacob Crowell's curator insight, September 22, 3:11 PM

Rhode Island excels at having the lowest CO2 emissions. This makes a lot of sense when you consider the characteristics the State as it relates to pollution. Manufacturing is not a large part of Rhode Island's production, therefore CO2 emissions from factories is less than many other states. Furthermore CO2 from automobiles is low because of the small size of the state. Commutes for people working and living in Rhode Island are no longer than an hour each way. The minimal drive time for each person also cuts down possible emissions. 

Wilmine Merlain's curator insight, November 1, 8:41 PM

This fun and interactive map shows where each state excel and where they falter. Its interesting to see that in a state a small as Rhode Island, it has the highest rate of breast cancer in the nation. And the state of Colorado has the most avalanche deaths, which when you think of the state of Colorado, you wouldn't think of Colorado as a state with a lot of avalanches. What really surprised me  was Alaska as having the most airports per capita. One wouldn't think this of Alaska since it is a state covered mostly with snow. And it raises the question as to how many people travel in and out of the state. With all of the states surprises, one thing that shocked me a bit was how much organic food is grown in this land. That's one thing that is surprising. I once viewed this land as a of imports of just about everything, but looking at these two maps have changed my outlook of this land.