Population density is a measurement of population per unit area or unit volume. It is applied to living organisms, most of the time to humans, it is a key geographical term. In simple terms population density refers to the number of people living in an area per kilometer square. Population density is population divided by total land water volume, as appropriate. Low densities may lead to further reduced fertility; this is called the Allee effect after the scientist. Examples of the causes in low population densities include: Increased problems with locating sexual mates Increased inbreeding For humans, population density is the number of people per unit of area quoted per square kilometer or square mile; this may be calculated for a county, country, another territory or the entire world. The world's population is around 7,500,000,000 and Earth's total area is 510,000,000 square kilometers. Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2. If only the Earth's land area of 150,000,000 km2 is taken into account human population density is 50 per km2.
This includes all continental and island land area, including Antarctica. If Antarctica is excluded population density rises to over 55 people per km2. However, over half of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, population tends to cluster around seaports and fresh-water sources. Thus, this number by itself does not give any helpful measurement of human population density. Several of the most densely populated territories in the world are city-states and dependencies; these territories have a small area and a high urbanization level, with an economically specialized city population drawing on rural resources outside the area, illustrating the difference between high population density and overpopulation The potential to maintain the agricultural aspects of deserts is limited as there is not enough precipitation to support a sustainable land. The population in these areas are low. Therefore, cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.
Cities with high population densities are, by some, considered to be overpopulated, though this will depend on factors like quality of housing and infrastructure and access to resources. Most of the most densely populated cities are in Southeast Asia, though Cairo and Lagos in Africa fall into this category. City population and area are, however dependent on the definition of "urban area" used: densities are invariably higher for the central city area than when suburban settlements and the intervening rural areas are included, as in the areas of agglomeration or metropolitan area, the latter sometimes including neighboring cities. For instance, Milwaukee has a greater population density when just the inner city is measured, the surrounding suburbs excluded. In comparison, based on a world population of seven billion, the world's inhabitants, as a loose crowd taking up ten square feet per person, would occupy a space a little larger than Delaware's land area; the Gaza Strip has a population density of 5,046 pop/km.
Although arithmetic density is the most common way of measuring population density, several other methods have been developed to provide a more accurate measure of population density over a specific area. Arithmetic density: The total number of people / area of land Physiological density: The total population / area of arable land Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Demography Human geography Idealized population Optimum population Population genetics Population health Population momentum Population pyramid Rural transport problem Small population size Distance sampling List of population concern organizations List of countries by population density List of cities by population density List of city districts by population density List of English districts by population density List of European cities proper by population density List of United States cities by population density List of islands by population density List of U.
S. states by population density List of Australian suburbs by population density Selected Current and Historic City, Ward & Neighborhood Density Duncan Smith / UCL Centre for Advanced Spatial Analysis. "World Population Density". Exploratory map shows data from the Global Human Settlement Layer produced by the European Commission JRC and the CIESIN Columbia University
2010 United States Census
The 2010 United States Census is the twenty-third and most recent United States national census. National Census Day, the reference day used for the census, was April 1, 2010; the census was taken via mail-in citizen self-reporting, with enumerators serving to spot-check randomly selected neighborhoods and communities. As part of a drive to increase the count's accuracy, 635,000 temporary enumerators were hired; the population of the United States was counted as 308,745,538, a 9.7% increase from the 2000 Census. This was the first census in which all states recorded a population of over half a million, as well as the first in which all 100 largest cities recorded populations of over 200,000; as required by the United States Constitution, the U. S. census has been conducted every 10 years since 1790. The 2000 U. S. Census was the previous census completed. Participation in the U. S. Census is required by law in Title 13 of the United States Code. On January 25, 2010, Census Bureau Director Robert Groves inaugurated the 2010 Census enumeration by counting World War II veteran Clifton Jackson, a resident of Noorvik, Alaska.
More than 120 million census forms were delivered by the U. S. Post Office beginning March 15, 2010; the number of forms mailed out or hand-delivered by the Census Bureau was 134 million on April 1, 2010. Although the questionnaire used April 1, 2010 as the reference date as to where a person was living, an insert dated March 15, 2010 included the following printed in bold type: "Please complete and mail back the enclosed census form today." The 2010 Census national mail participation rate was 74%. From April through July 2010, census takers visited households that did not return a form, an operation called "non-response follow-up". In December 2010, the U. S. Census Bureau delivered population information to the U. S. President for apportionment, in March 2011, complete redistricting data was delivered to states. Identifiable information will be available in 2082; the Census Bureau did not use a long form for the 2010 Census. In several previous censuses, one in six households received this long form, which asked for detailed social and economic information.
The 2010 Census used only a short form asking ten basic questions: How many people were living or staying in this house, apartment, or mobile home on April 1, 2010? Were there any additional people staying here on April 1, 2010 that you did not include in Question 1? Mark all that apply: Is this house, apartment, or mobile home – What is your telephone number? What is Person 1's name? What is Person 1's sex? What is Person 1's age and Person 1's date of birth? Is Person 1 of Hispanic, Latino, or Spanish origin? What is Person 1's race? Does Person 1 sometimes live or stay somewhere else? The form included space to repeat all of these questions for up to twelve residents total. In contrast to the 2000 census, an Internet response option was not offered, nor was the form available for download. Detailed socioeconomic information collected during past censuses will continue to be collected through the American Community Survey; the survey provides data about communities in the United States on a 1-year or 3-year cycle, depending on the size of the community, rather than once every 10 years.
A small percentage of the population on a rotating basis will receive the survey each year, no household will receive it more than once every five years. In June 2009, the U. S. Census Bureau announced. However, the final form did not contain a separate "same-sex married couple" option; when noting the relationship between household members, same-sex couples who are married could mark their spouses as being "Husband or wife", the same response given by opposite-sex married couples. An "unmarried partner" option was available for couples; the 2010 census cost $13 billion $42 per capita. Operational costs were $5.4 billion under the $7 billion budget. In December 2010 the Government Accountability Office noted that the cost of conducting the census has doubled each decade since 1970. In a detailed 2004 report to Congress, the GAO called on the Census Bureau to address cost and design issues, at that time, had estimated the 2010 Census cost to be $11 billion. In August 2010, Commerce Secretary Gary Locke announced that the census operational costs came in under budget.
Locke credited the management practices of Census Bureau director Robert Groves, citing in particular the decision to buy additional advertising in locations where responses lagged, which improved the overall response rate. The agency has begun to rely more on questioning neighbors or other reliable third parties when a person could not be reached at home, which reduced the cost of follow-up visits. Census data for about 22% of U. S. househol
A city is a large human settlement. Cities have extensive systems for housing, sanitation, land use, communication, their density facilitates interaction between people, government organizations and businesses, sometimes benefiting different parties in the process. City-dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization half of the world population now lives in cities, which has had profound consequences for global sustainability. Present-day cities form the core of larger metropolitan areas and urban areas—creating numerous commuters traveling towards city centers for employment and edification. However, in a world of intensifying globalization, all cities are in different degree connected globally beyond these regions; the most populated city proper is Chongqing while the most populous metropolitan areas are the Greater Tokyo Area, the Shanghai area, Jabodetabek. The cities of Faiyum and Varanasi are among those laying claim to longest continual inhabitation.
A city is distinguished from other human settlements by its great size, but by its functions and its special symbolic status, which may be conferred by a central authority. The term can refer either to the physical streets and buildings of the city or to the collection of people who dwell there, can be used in a general sense to mean urban rather than rural territory. A variety of definitions, invoking population, population density, number of dwellings, economic function, infrastructure, are used in national censuses to classify populations as urban. Common population definitions for a city range between 1,500 and 50,000 people, with most U. S. states using a minimum between 5,000 inhabitants. However, some jurisdictions set no such minimums. In the United Kingdom, city status is awarded by the government and remains permanently, resulting in some small cities, such as Wells and St Davids. According to the "functional definition" a city is not distinguished by size alone, but by the role it plays within a larger political context.
Cities serve as administrative, commercial and cultural hubs for their larger surrounding areas. Examples of settlements called city which may not meet any of the traditional criteria to be named such include Broad Top City and City Dulas, Anglesey, a hamlet; the presence of a literate elite is sometimes included in the definition. A typical city has professional administrators and some form of taxation to support the government workers; the governments may be based on heredity, military power, work projects such as canal building, food distribution, land ownership, commerce, finance, or a combination of these. Societies that live in cities are called civilizations; the word city and the related civilization come, via Old French, from the Latin root civitas meaning citizenship or community member and coming to correspond with urbs, meaning city in a more physical sense. The Roman civitas was linked with the Greek "polis"—another common root appearing in English words such as metropolis. Urban geography deals both with their internal structure.
Town siting has varied through history according to natural, technological and military contexts. Access to water has long been a major factor in city placement and growth, despite exceptions enabled by the advent of rail transport in the nineteenth century, through the present most of the world's urban population lives near the coast or on a river. Urban areas as a rule cannot produce their own food and therefore must develop some relationship with a hinterland which sustains them. Only in special cases such as mining towns which play a vital role in long-distance trade, are cities disconnected from the countryside which feeds them. Thus, centrality within a productive region influences siting, as economic forces would in theory favor the creation of market places in optimal mutually reachable locations; the vast majority of cities have a central area containing buildings with special economic and religious significance. Archaeologists refer to this area by the Greek term temenos; these spaces reflect and amplify the city's centrality and importance to its wider sphere of influence.
Today cities have downtown, sometimes coincident with a central business district. Cities have public spaces where anyone can go; these include owned spaces open to the public as well as forms of public land such as public domain and the commons. Western philosophy since the time of the Greek agora has considered physical public space as the substrate of the symbolic public sphere. Public art adorns public spaces. Parks and other natural sites within cities provide residents with relief from the hardness and regularity of typical built environments. Urban structure follows one or more basic patterns: geomorphic, concentric and curvilinear. Physical environment constrains the form in which a city is built. If located on a mountainside, urban structure may rely on winding roads, it may be adapted to its means of subsistence. And it may be set up for optimal defense given the surrounding landscape. Beyond these "geomorphi
1890 United States Census
The Eleventh United States Census was taken beginning June 2, 1890. It determined the resident population of the United States to be 62,979,766—an increase of 25.5 percent over the 50,189,209 persons enumerated during the 1880 census. The data was tabulated by machine for the first time; the data reported that the distribution of the population had resulted in the disappearance of the American frontier. Most of the 1890 census materials were destroyed in a 1921 fire and fragments of the US census population schedule exist only for the states of Alabama, Illinois, New Jersey, New York, North Carolina, South Dakota, Texas, the District of Columbia; this was the first census in which a majority of states recorded populations of over one million, as well as the first in which multiple cities – New York as of 1880, Philadelphia – recorded populations of over one million. The census saw Chicago rank as the nation's second-most populous city, a position it would hold until 1990, in which Los Angeles would supplant it.
The 1890 census collected the following information: The 1890 census was the first to be compiled using methods invented by Herman Hollerith and was overseen by Superintendents Robert P. Porter and Carroll D. Wright. Data was entered on a machine readable medium, punched cards, tabulated by machine; the net effect of the many changes from the 1880 census: the larger population, the number of data items to be collected, the Census Bureau headcount, the volume of scheduled publications, the use of Hollerith's electromechanical tabulators, was to reduce the time required to process the census from eight years for the 1880 census to six years for the 1890 census. The total population of 62,947,714, the family, or rough, was announced after only six weeks of processing; the public reaction to this tabulation was disbelief, as it was believed that the "right answer" was at least 75,000,000. The United States census of 1890 showed a total of 248,253 Native Americans living in the United States, down from 400,764 Native Americans identified in the census of 1850.
The 1890 census announced that the frontier region of the United States no longer existed, that the Census Bureau would no longer track the westward migration of the U. S. population. Up to and including the 1880 census, the country had a frontier of settlement. By 1890, isolated bodies of settlement had broken into the unsettled area to the extent that there was hardly a frontier line; this prompted Frederick Jackson Turner to develop his Frontier Thesis. The original data for the 1890 Census is no longer available. All the population schedules were damaged in a fire in the basement of the Commerce Building in Washington, D. C. in 1921. Some 25 % of the materials were presumed another 50 % damaged by smoke and water; the damage to the records led to an outcry for a permanent National Archives. In December 1932, following standard federal record-keeping procedures, the Chief Clerk of the Bureau of the Census sent the Librarian of Congress a list of papers to be destroyed, including the original 1890 census schedules.
The Librarian was asked by the Bureau to identify any records which should be retained for historical purposes, but the Librarian did not accept the census records. Congress authorized destruction of that list of records on February 21, 1933, the surviving original 1890 census records were destroyed by government order by 1934 or 1935; the other censuses for which some information has been lost are the 1810 enumerations. Few sets of microdata from the 1890 census survive, but aggregate data for small areas, together with compatible cartographic boundary files, can be downloaded from the National Historical Geographic Information System. Mayo-Smith, Richmond, "The Eleventh Census of the United States". In: The Economic Journal, Vol. 1, p. 43 - 58 1891 U. S Census Report Contains 1890 Census results Historical US Census data from the U. S. Census Bureau website Hollerith 1890 Census Tabulator by Columbia University "The Fate of the 1890 Population Census" from the National Archives website
Georgia (U.S. state)
Georgia is a state in the Southeastern United States. It began as a British colony in 1733, the last and southernmost of the original Thirteen Colonies to be established. Named after King George II of Great Britain, the Province of Georgia covered the area from South Carolina south to Spanish Florida and west to French Louisiana at the Mississippi River. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788. In 1802–1804, western Georgia was split to the Mississippi Territory, which split to form Alabama with part of former West Florida in 1819. Georgia declared its secession from the Union on January 19, 1861, was one of the original seven Confederate states, it was the last state to be restored to the Union, on July 15, 1870. Georgia is the 8th most populous of the 50 United States. From 2007 to 2008, 14 of Georgia's counties ranked among the nation's 100 fastest-growing, second only to Texas. Georgia is known as the Empire State of the South. Atlanta, the state's capital and most populous city, has been named a global city.
Atlanta's metropolitan area contains about 55% of the population of the entire state. Georgia is bordered to the north by Tennessee and North Carolina, to the northeast by South Carolina, to the southeast by the Atlantic Ocean, to the south by Florida, to the west by Alabama; the state's northernmost part is in the Blue Ridge Mountains, part of the Appalachian Mountains system. The Piedmont extends through the central part of the state from the foothills of the Blue Ridge to the Fall Line, where the rivers cascade down in elevation to the coastal plain of the state's southern part. Georgia's highest point is Brasstown Bald at 4,784 feet above sea level. Of the states east of the Mississippi River, Georgia is the largest in land area. Before settlement by Europeans, Georgia was inhabited by the mound building cultures; the British colony of Georgia was founded by James Oglethorpe on February 12, 1733. The colony was administered by the Trustees for the Establishment of the Colony of Georgia in America under a charter issued by King George II.
The Trustees implemented an elaborate plan for the colony's settlement, known as the Oglethorpe Plan, which envisioned an agrarian society of yeoman farmers and prohibited slavery. The colony was invaded by the Spanish during the War of Jenkins' Ear. In 1752, after the government failed to renew subsidies that had helped support the colony, the Trustees turned over control to the crown. Georgia became a crown colony, with a governor appointed by the king; the Province of Georgia was one of the Thirteen Colonies that revolted against British rule in the American Revolution by signing the 1776 Declaration of Independence. The State of Georgia's first constitution was ratified in February 1777. Georgia was the 10th state to ratify the Articles of Confederation on July 24, 1778, was the 4th state to ratify the United States Constitution on January 2, 1788. In 1829, gold was discovered in the North Georgia mountains leading to the Georgia Gold Rush and establishment of a federal mint in Dahlonega, which continued in operation until 1861.
The resulting influx of white settlers put pressure on the government to take land from the Cherokee Nation. In 1830, President Andrew Jackson signed the Indian Removal Act, sending many eastern Native American nations to reservations in present-day Oklahoma, including all of Georgia's tribes. Despite the Supreme Court's ruling in Worcester v. Georgia that U. S. states were not permitted to redraw Indian boundaries, President Jackson and the state of Georgia ignored the ruling. In 1838, his successor, Martin Van Buren, dispatched federal troops to gather the tribes and deport them west of the Mississippi; this forced relocation, known as the Trail of Tears, led to the death of over 4,000 Cherokees. In early 1861, Georgia became a major theater of the Civil War. Major battles took place at Chickamauga, Kennesaw Mountain, Atlanta. In December 1864, a large swath of the state from Atlanta to Savannah was destroyed during General William Tecumseh Sherman's March to the Sea. 18,253 Georgian soldiers died in service one of every five who served.
In 1870, following the Reconstruction Era, Georgia became the last Confederate state to be restored to the Union. With white Democrats having regained power in the state legislature, they passed a poll tax in 1877, which disenfranchised many poor blacks and whites, preventing them from registering. In 1908, the state established a white primary, they constituted 46.7% of the state's population in 1900, but the proportion of Georgia's population, African American dropped thereafter to 28% due to tens of thousands leaving the state during the Great Migration. According to the Equal Justice Institute's 2015 report on lynching in the United States, Georgia had 531 deaths, the second-highest total of these extralegal executions of any state in the South; the overwhelming number of victims were male. Political disfranchisement persisted through the mid-1960s, until after Congress passed the Voting Rights Act of 1965. An Atlanta-born Baptist minister, part of the educated middle class that had developed in Atlanta's African-American community, Martin Luther King, Jr. emerged as a national leader in the civil rights movement.
King joining with others to form the Southern Christian Leadership Conference in Atlanta in 1957 to provide political leadership for the Civil Rights Movement across the South. By the 1960s, the proportion of
Louisville is a city in Jefferson County, United States. It is the county seat of Jefferson County, it is located southwest of Augusta on the Ogeechee River, its population was 2,493 at the 2010 census, down from 2,712 at the 2000 census. The name is pronounced "Lewis-ville" by locals. Louisville was incorporated on January 1786, as the prospective state capital. Savannah had served as the colonial capital, but was considered too far from the center of population in the growing state. Louisville was named for Louis XVI, still the King of France and had aided the Continentals during the successful American Revolutionary War. Development of the city began and its state government buildings were completed in 1795. An old Revolutionary War Soldiers Cemetery is located on the western side of town; the city of Louisville served as the state capital of Georgia from 1796 to 1806. It was a center of trade and political influence; the Jefferson County courthouse, built in 1904, stands on the site of Georgia's first permanent capitol building.
Louisville's historic, open-sided market house still stands in the center of downtown. The original market had sections for sales of farm produce, household goods, enslaved African Americans; the Old Market is listed on the National Register of Historic Places. Roads and other transportation routes intersected at the market square, the hub of the region when the town was the state capital; the state capital was moved to Milledgeville and to Atlanta, in the Piedmont. As a small city and county seat, Louisville now has few major industries. A marker dedicated to the Yazoo land scandal of the 19th century is located in front of the Jefferson County Courthouse. Queensborough National Bank and Trust Company was founded in 1902 and is headquartered in Louisville, on U. S. Highway 1. Louisville is located south of the center of Jefferson County at 33°0′15″N 82°24′18″W. U. S. Route 1 passes through the east side of the city, leading northeast 46 miles to Augusta and south 30 miles to Swainsboro. U. S. Route 221 passes through the north side of downtown as Peachtree Street and leads southwest 10 miles to Bartow.
US-221 leaves Louisville to the north, running with US-1 15 miles to Wrens before continuing north toward Harlem. According to the United States Census Bureau, Louisville has a total area of 3.7 square miles, of which 3.6 square miles are land and 0.1 square miles, or 1.93%, are water. The western city boundary follows Rocky Comfort Creek, which flows into the Ogeechee River at the city limits' southwest corner; the Ogeechee flows to the Atlantic Ocean south of Savannah. As of the census of 2000, there were 2,712 people, 994 households, 664 families residing in the city; the population density was 755.5 people per square mile. There were 1,123 housing units at an average density of 312.8 per square mile. The racial makeup of the city was 65.93% African American, 33.63% White, 0.04% Native American, 0.22% Asian, 0.07% from other races, 0.11% from two or more races. Hispanic or Latino of any race were 0.37% of the population. There were 994 households out of which 33.4% had children under the age of 18 living with them, 35.8% were married couples living together, 27.4% had a female householder with no husband present, 33.1% were non-families.
31.4% of all households were made up of individuals and 16.1% had someone living alone, 65 years of age or older. The average household size was 2.56 and the average family size was 3.22. In the city, the population was spread out with 28.2% under the age of 18, 8.3% from 18 to 24, 25.1% from 25 to 44, 19.9% from 45 to 64, 18.5% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 77.7 males. For every 100 females age 18 and over, there were 71.8 males. The median income for a household in the city was $19,883, the median income for a family was $32,578. Males had a median income of $31,500 versus $16,921 for females; the per capita income for the city was $15,028. About 23.1% of families and 28.9% of the population were below the poverty line, including 27.8% of those under age 18 and 51.8% of those age 65 or over. The Jefferson County School District holds pre-school to grade twelve, consists of two elementary schools, two middle schools, a high school, an academy school.
The district has 199 full-time teachers and over 3,526 students. Louisville Academy Carver Elementary School Wrens Elementary School Louisville Middle School Jefferson County High School Thomas Jefferson Academy Central Savannah River Area List of municipalities in Georgia Local radio station: WPEH, Big Peach Radio National Register of Historic Places listings in Jefferson County, Georgia Strong, Robert Hale. Halsey, Ashley, ed. A Yankee Private's Civil War. Chicago: Henry Regnery Company. Pp. 106–108. LCCN 61-10744. OCLC 1058411. GovernmentOfficial websiteGeneral information Geographic data related to Louisville, Georgia at OpenStreetMap Louisville, Georgia at the Digital Library of Georgia Louisville, Georgia at Jefferson County Chamber of Commerce and Development Authority of Jefferson County Louisville, Georgia at New Georgia Encyclopedia Louisville Public Library at Jefferson County Library System The Sacking of Louisville at The Historical Marker Database
1930 United States Census
The Fifteenth United States Census, conducted by the Census Bureau one month from April 1, 1930, determined the resident population of the United States to be 122,775,046, an increase of 13.7 percent over the 106,021,537 persons enumerated during the 1920 Census. The 1930 Census collected the following information: address name relationship to head of family home owned or rented if owned, value of home if rented, monthly rent whether owned a radio set whether on a farm sex race age marital status and, if married, age at first marriage school attendance literacy birthplace of person, their parents if foreign born: language spoken at home before coming to the U. S. year of immigration whether naturalized ability to speak English occupation and class of worker whether at work previous day veteran status if Indian: whether of full or mixed blood tribal affiliationFull documentation for the 1930 census, including census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series.
The original census enumeration sheets were microfilmed by the Census Bureau in 1949. The microfilmed census is located on 2,667 rolls of microfilm, available from the National Archives and Records Administration. Several organizations host images of the microfilmed census online, digital indices. Microdata from the 1930 census are available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. 1930 Census Questions Hosted at CensusFinder.com 1931 U. S Census Report Contains 1930 Census results Historic US Census data 1930Census.com: 1930 United States Census for Genealogy & Family History Research 1930 Interactive US Census Find stories and more attached to names on the 1930 US census