While any measurement of the exact center of the United States will always be imprecise for a number of reasons, such factors as the exact placement of thousands of miles of changing shoreline, the U.S. National Geodetic Survey (NGS) has produced designated measurements for the center of the United States to the best of its ability to do so.
From the time of the 1912 additions of New Mexico and Arizona, until the 1959 additions of Alaska and Hawaii, the NGS placed the geographic center of the entire United States at a point near the town of Lebanon, Kansas. Since 1959 this location still stands as the Geographic Center of the Contiguous United States, while the geographic center of the entire U.S. moved to a point northeast of Belle Fourche, South Dakota.
The location for contiguous U.S. center is pinpointed by a historical marker that is located within a small park at the intersection of AA Road and K-191, accessible by a turn-off from U.S. Route 281 approximately a mile north of the town of Lebanon.
The contiguous United States are the 48 U.S. states on the continent of North America that are south of Canada and north of Mexico, plus the District of Columbia. The term excludes the states of Alaska and Hawaii, and all off-shore U.S. territories and possessions, such as Puerto Rico.
Together, the 48 contiguous states and D.C. occupy a combined area of 3,119,884.69 square miles (8,080,464.3 km2). Of this, 2,959,064.44 square miles (7,663,941.7 km2) is land, comprising 83.65% of U.S. land area. Officially, 160,820.25 square miles (416,522.5 km2) is water area, comprising 62.66% of the nation's water area. Its 2000 census population was 279,583,437, comprising 99.35% of the nation's population. Its population density was 94.484 inhabitants/sq mi (36.480/km²), compared to 79.555/sq mi (30.716/km²) for the nation as a whole. The 2010 census population was 306,675,006, comprising 99.33% of the nation's population, and a density of 103.639 inhabitants/sq mi (40.015/km²), compared to 87.264/sq mi (33.692/km²) for the nation as a whole.
The United States of America (commonly abbreviated to the United States, the U.S., the USA, America, and the States) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to the east and Russia to the west, across the Bering Strait. The state of Hawaii is an archipelago in the mid-Pacific. The country also possesses several territories in the Pacific and Caribbean.
At 3.79 million square miles (9.83 million km2) and with over 312 million people, the United States is the third or fourth largest country by total area, and the third largest by both land area and population. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries. The U.S. economy is the world's largest national economy, with an estimated 2011 GDP of $15.1 trillion (22% of nominal global GDP and over 19% of global GDP at purchasing-power parity). Per capita income is the world's sixth-highest.
In geography, the centroid of the two-dimensional shape of region of the Earth's surface is often known as its geographical centre. There has long been debate over the methods of calculation of the geographical centres of various countries and regions, such as whether to include offshore islands, and in that case, if the islands should be moved towards the mainland, making it possible to build a connected 2D model of the country and identify the geographical centre as the centre of gravity (equilibrium point) using a needle. An alternative to defining the geographical centre as the centroid is to define it as the point farthest from the boundary of the country (either the sea, or, in the case of constituent countries, a land border). These methods give quite different answers.
Tired eyes
Closed for days
There's no regret
'Cause there's no place
I don't know
What I believe
But if I feel safe
What do I need
A home
A home
A home
Revolution
Revolution
Revolution blues
What will they do
Revolution
Revolution
Revolution blues
What will they do to me
What will they do to me
What will they do to me
What will they do to me
Dulcet tongues
Whisper fast
The future yearns
Right now's the past
Rouse me soon
The end draws nigh
Who's side are you on
Your blood you cannot buy
Revolution
Revolution
Revolution blues
What will they do
Revolution
Revolution
Revolution blues
What will they do to you
Well I
I feel alright
So tonight
I got to ask you why
Why deny it
It's no surprise
I've got to survive
Freedom shines the light ahead
I'll lead the last charge to bed
I said my last rights
I don't have to run scared no more
Fight
I wanna fight
I wanna fight a revolution
Tonight
I wanna fight
I wanna fight a revolution
Tonight
At the light
At the light
Do you wanna watch me die
Let me be something good
Let me prove something real like I should
Let me embrace every single living thing