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
Race and ethnicity in the United States Census
Race and ethnicity in the United States Census, defined by the federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most identify, indicate whether or not they are of Hispanic or Latino origin. The racial categories represent a social-political construct for the race or races that respondents consider themselves to be and, "generally reflect a social definition of race recognized in this country." OMB defines the concept of race as outlined for the US Census as not "scientific or anthropological" and takes into account "social and cultural characteristics as well as ancestry", using "appropriate scientific methodologies" that are not "primarily biological or genetic in reference." The race categories include both national-origin groups. Race and ethnicity are considered separate and distinct identities, with Hispanic or Latino origin asked as a separate question. Thus, in addition to their race or races, all respondents are categorized by membership in one of two ethnic categories, which are "Hispanic or Latino" and "Not Hispanic or Latino".
However, the practice of separating "race" and "ethnicity" as different categories has been criticized both by the American Anthropological Association and members of US Commission on Civil Rights. In 1997, OMB issued a Federal Register notice regarding revisions to the standards for the classification of federal data on race and ethnicity. OMB developed race and ethnic standards in order to provide "consistent data on race and ethnicity throughout the Federal Government; the development of the data standards stem in large measure from new responsibilities to enforce civil rights laws." Among the changes, OMB issued the instruction to "mark one or more races" after noting evidence of increasing numbers of interracial children and wanting to capture the diversity in a measurable way and having received requests by people who wanted to be able to acknowledge their or their children's full ancestry rather than identifying with only one group. Prior to this decision, the Census and other government data collections asked people to report only one race.
The OMB states, "many federal programs are put into effect based on the race data obtained from the decennial census. Race data are critical for the basic research behind many policy decisions. States require these data to meet legislative redistricting requirements; the data are needed to monitor compliance with the Voting Rights Act by local jurisdictions". "Data on ethnic groups are important for putting into effect a number of federal statutes. Data on Ethnic Groups are needed by local governments to run programs and meet legislative requirements." The 1790 United States Census was the first census in the history of the United States. The population of the United States was recorded as 3,929,214 as of Census Day, August 2, 1790, as mandated by Article I, Section 2 of the United States Constitution and applicable laws."The law required that every household be visited, that completed census schedules be posted in'two of the most public places within, there to remain for the inspection of all concerned...' and that'the aggregate amount of each description of persons' for every district be transmitted to the president."
This law along with U. S. marshals were responsible for governing the census. One third of the original census data has been lost or destroyed since documentation; the data was lost in 1790–1830 time period and included data from: Connecticut, Maryland, New Hampshire, New York, North Carolina, Rhode Island, South Carolina, Delaware, New Jersey, Virginia. Census data included the name of the head of the family and categorized inhabitants as follows: free white males at least 16 years of age, free white males under 16 years of age, free white females, all other free persons, slaves. Thomas Jefferson the Secretary of State, directed marshals to collect data from all thirteen states, from the Southwest Territory; the census was not conducted in Vermont until 1791, after that state's admission to the Union as the 14th state on March 4 of that year. There was some doubt surrounding the numbers, President George Washington and Thomas Jefferson maintained the population was undercounted; the potential reasons Washington and Jefferson may have thought this could be refusal to participate, poor public transportation and roads, spread out population, restraints of current technology.
No microdata from the 1790 population census is available, but aggregate data for small areas and their compatible cartographic boundary files, can be downloaded from the National Historical Geographic Information System. In 1800 and 1810, the age question regarding free white males was more detailed; the 1820
Lancaster is a city located in South Central Pennsylvania which serves as the seat of Pennsylvania's Lancaster County and one of the oldest inland towns in the United States. With a population of 59,322, it ranks eighth in population among Pennsylvania's cities; the Lancaster metropolitan area population is 507,766, making it the 101st largest metropolitan area in the U. S. and second largest in the South Central Pennsylvania area. The city's primary industries include healthcare, public administration and both professional and semi-professional services. Lancaster hosts more electronic public CCTV outdoor cameras per capita than cities such as Boston or San Francisco, despite controversy among residents. Lancaster was home to James Buchanan, the nation's 15th president, to congressman and abolitionist Thaddeus Stevens. Called Hickory Town, the city was renamed after the English city of Lancaster by native John Wright, its symbol, is from the House of Lancaster. Lancaster was part of the 1681 Penn's Woods Charter of William Penn, was laid out by James Hamilton in 1734.
It was incorporated as a borough in 1742 and incorporated as a city in 1818. During the American Revolution, Lancaster was the capital of the United States for one day, on September 27, 1777, after the Continental Congress fled Philadelphia, captured by the British; the revolutionary government moved still farther away to York, Pennsylvania. Lancaster was capital of Pennsylvania from 1799 to 1812, after which the capital was moved to Harrisburg. In 1851, the current Lancaster County Prison was built in the city, styled after Lancaster Castle in England; the prison remains in use, was used for public hangings until 1912. It replaced a 1737 structure on a different site; the first paved road in the United States was the former Philadelphia and Lancaster Turnpike, which makes up part of the present-day U. S. Route 30. Opened in 1795, the Turnpike connected the cities of Lancaster and Philadelphia, was designed by a Scottish engineer named John Loudon McAdam. Lancaster residents are known to use the word "macadam" in lieu of asphalt.
This name is a reference to the paving process named for McAdam. The city of Lancaster was home to several important figures in American history. Wheatland, the estate of James Buchanan, the fifteenth President of the United States, is one of Lancaster's most popular attractions. Thaddeus Stevens, considered among the most powerful members of the United States House of Representatives, lived in Lancaster as an attorney. Stevens gained notoriety for his abolitionism; the Fulton Opera House in the city was named for Lancaster native Robert Fulton, a renaissance man who created the first functional steamboat. All of these individuals have had local schools named after them. After the American Revolution, the city of Lancaster became an iron-foundry center. Two of the most common products needed by pioneers to settle the Frontier were manufactured in Lancaster: the Conestoga wagon and the Pennsylvania long rifle; the Conestoga wagon was named after the Conestoga River. The innovative gunsmith William Henry lived in Lancaster and was a U.
S. congressman and leader during and after the American Revolution. In 1803, Meriwether Lewis visited Lancaster to be educated in survey methods by the well-known surveyor Andrew Ellicott. During his visit, Lewis learned to plot latitude and longitude as part of his overall training needed to lead the Lewis and Clark Expedition. In 1879, Franklin Winfield Woolworth opened his first successful "five and dime" store in the city of Lancaster, the F. W. Woolworth Company. Lancaster was one of the winning communities for the All-America City award in 2000. On October 13, 2011, Lancaster's City Council recognized September 27 as Capital Day, a holiday recognizing Lancaster's one day as capital of the United States in 1777. Lancaster is located at 40°02'23" North, 76°18'16" West, is 368 feet above sea level; the city is located about 34 miles southeast of Harrisburg, 70 miles west of Philadelphia, 55 miles north-northeast of Baltimore and 87 miles northeast of Washington, D. C; the nearest towns and boroughs are Millersville, Willow Street, East Petersburg, Landisville, Mountville and Leola.
According to the United States Census Bureau, the city has a total area of 7.4 square miles, of which, 7.4 square miles of it is land and 0.14% is water. Lancaster has a humid subtropical climate with hot or warm summers; as of the 2010 census, the city was 55.2% White, 16.3% Black or African American, 0.7% Native American, 3.0% Asian, 0.1% Native Hawaiian, 5.8% were two or more races. 39.3 % of the population were of Latino ancestry. As of the census of 2000, there were 56,348 people, 20,933 households, 12,162 families residing in the city; the population density was 7,616.5 people per square mile. There were 23,024 housing units at an average density of 3,112.1 per square mile. The racial makeup of the city was 61.55% White, 14.09% African American, 0.44% Native American, 2.46% Asian, 0.08% Pacific Islander, 17.44% from other races, 3.94% from two or more races. 30.76 % of the population were Latino people of any race. The largest ethnic groups in Lancaster as of recent estimates are: Puerto Rican 29.2% German 21.2% African American 12.8% Irish 8.6% English 8.2% Italian 4.1% Dominican 3.2% Polish 2.0% Scottish 1.9% Mexican 1.8% Cuban 1.7% West Indian 1.0%In 2010, 29.2% of Lancaster residents were of P
1940 United States Census
The Sixteenth United States Census, conducted by the Census Bureau, determined the resident population of the United States to be 132,164,569, an increase of 7.3 percent over the 1930 population of 123,202,624 people. The census date of record was April 1, 1940. A number of new questions were asked including where people were 5 years before, highest educational grade achieved, information about wages; this census introduced sampling techniques. Other innovations included a field test of the census in 1939; this was the first census in which every state had a population greater than 100,000. The 1940 census collected the following information: In addition, a sample of individuals were asked additional questions covering age at first marriage and other topics. Full documentation on the 1940 census, including census forms and a procedural history, is available from the Integrated Public Use Microdata Series. Following completion of the census, the original enumeration sheets were microfilmed; as required by Title 13 of the U.
S. Code, access to identifiable information from census records was restricted for 72 years. Non-personally identifiable information Microdata from the 1940 census is 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. On April 2, 2012—72 years after the census was taken—microfilmed images of the 1940 census enumeration sheets were released to the public by the National Archives and Records Administration; the records are indexed only by enumeration district upon initial release. Official 1940 census website 1940 Census Records from the U. S. National Archives and Records Administration 1940 Federal Population Census Videos, training videos for enumerators at the U. S. National Archives Selected Historical Decennial Census Population and Housing Counts from the U. S. Census Bureau Snow, Michael S. "Why the huge interest in the 1940 Census?"
CNN. Monday April 9, 2012. 1941 U. S Census Report Contains 1940 Census results 1940 Census Questions Hosted at CensusFinder.com
A census is the procedure of systematically acquiring and recording information about the members of a given population. The term is used in connection with national population and housing censuses; the United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory and defined periodicity", recommends that population censuses be taken at least every 10 years. United Nations recommendations cover census topics to be collected, official definitions and other useful information to co-ordinate international practice; the word is of Latin origin: during the Roman Republic, the census was a list that kept track of all adult males fit for military service. The modern census is essential to international comparisons of any kind of statistics, censuses collect data on many attributes of a population, not just how many people there are. Censuses began as the only method of collecting national demographic data, are now part of a larger system of different surveys.
Although population estimates remain an important function of a census, including the geographic distribution of the population, statistics can be produced about combinations of attributes e.g. education by age and sex in different regions. Current administrative data systems allow for other approaches to enumeration with the same level of detail but raise concerns about privacy and the possibility of biasing estimates. A census can be contrasted with sampling in which information is obtained only from a subset of a population. Modern census data are used for research, business marketing, planning, as a baseline for designing sample surveys by providing a sampling frame such as an address register. Census counts are necessary to adjust samples to be representative of a population by weighting them as is common in opinion polling. Stratification requires knowledge of the relative sizes of different population strata which can be derived from census enumerations. In some countries, the census provides the official counts used to apportion the number of elected representatives to regions.
In many cases, a chosen random sample can provide more accurate information than attempts to get a population census. A census is construed as the opposite of a sample as its intent is to count everyone in a population rather than a fraction. However, population censuses rely on a sampling frame to count the population; this is the only way to be sure that everyone has been included as otherwise those not responding would not be followed up on and individuals could be missed. The fundamental premise of a census is that the population is not known and a new estimate is to be made by the analysis of primary data; the use of a sampling frame is counterintuitive as it suggests that the population size is known. However, a census is used to collect attribute data on the individuals in the nation; this process of sampling marks the difference between historical census, a house to house process or the product of an imperial decree, the modern statistical project. The sampling frame used by census is always an address register.
Thus it is not known how many people there are in each household. Depending on the mode of enumeration, a form is sent to the householder, an enumerator calls, or administrative records for the dwelling are accessed; as a preliminary to the dispatch of forms, census workers will check any address problems on the ground. While it may seem straightforward to use the postal service file for this purpose, this can be out of date and some dwellings may contain a number of independent households. A particular problem is what are termed'communal establishments' which category includes student residences, religious orders, homes for the elderly, people in prisons etc; as these are not enumerated by a single householder, they are treated differently and visited by special teams of census workers to ensure they are classified appropriately. Individuals are counted within households and information is collected about the household structure and the housing. For this reason international documents refer to censuses of housing.
The census response is made by a household, indicating details of individuals resident there. An important aspect of census enumerations is determining which individuals can be counted from which cannot be counted. Broadly, three definitions can be used: de facto residence; this is important to consider individuals who have temporary addresses. Every person should be identified uniquely as resident in one place but where they happen to be on Census Day, their de facto residence, may not be the best place to count them. Where an individual uses services may be more useful and this is at their usual, or de jure, residence. An individual may be represented at a permanent address a family home for students or long term migrants, it is necessary to have a precise definition of residence to decide whether visitors to a country should be included in the population count. This is becoming more important as students travel abroad for education for a period of several years. Other groups causing problems of enumeration are new born babies, people away on holiday, people moving home around census day, people without a fixed address.
People having second homes because of working in another part of the country or retaining a holiday cottage are dif
The Mennonites are members of certain Christian groups belonging to the church communities of Anabaptist denominations named after Menno Simons of Friesland. Through his writings, Simons formalized the teachings of earlier Swiss founders; the early teachings of the Mennonites were founded on the belief in both the mission and ministry of Jesus, which the original Anabaptist followers held to with great conviction despite persecution by the various Roman Catholic and Protestant states. An early set of Mennonite beliefs was codified in the Dordrecht Confession of Faith in 1632, but the various groups do not hold to a common confession or creed. Rather than fight, the majority of these followers survived by fleeing to neighboring states where ruling families were tolerant of their belief in believer's baptism. Over the years, Mennonites have become known as one of the historic peace churches because of their commitment to pacifism. In contemporary 21st-century society, Mennonites either are described only as a religious denomination with members of different ethnic origins or as both an ethnic group and a religious denomination.
There is controversy among Mennonites about this issue, with some insisting that they are a religious group while others argue that they form a distinct ethnic group. Historians and sociologists have started to treat Mennonites as an ethno-religious group, while others have begun to challenge that perception. There is a discussion about the term "ethnic Mennonite". Conservative Mennonite groups, who speak Pennsylvania German, Plautdietsch, or Bernese German fit well into the definition of an ethnic group, while more liberal groups and converts in developing countries do not. There are about 2.1 million Anabaptists worldwide as of 2015. Mennonite congregations worldwide embody the full scope of Mennonite practice from "plain people" to those who are indistinguishable in dress and appearance from the general population. Mennonites can be found in communities in at least 87 countries on six continents; the largest populations of Mennonites are to be found in Canada, the Democratic Republic of the Congo, Ethiopia and the United States.
There are Mennonite colonies in Argentina, Bolivia, Mexico and Paraguay Plautdietsch-speaking, who originated in the Netherlands, formed as a distinct ethnic group in Prussia and Ukraine, are called, somewhat inaccurately, Russian Mennonites. Today, fewer than 500 Mennonites remain in Ukraine. A small Mennonite presence, known as the Algemene Doopsgezinde Societeit, still continues in the Netherlands, where Simons was born; the early history of the Mennonites starts with the Anabaptists in the German and Dutch-speaking parts of central Europe. The German term is "Täufer" or "Wiedertäufer"; these forerunners of modern Mennonites were part of the Protestant Reformation, a broad reaction against the practices and theology of the Roman Catholic Church. Its most distinguishing feature is the rejection of infant baptism, an act that had both religious and political meaning since every infant born in western Europe was baptized into the Roman Catholic Church. Other significant theological views of the Mennonites developed in opposition to Roman Catholic views or to the views of other Protestant reformers such as Martin Luther and Huldrych Zwingli.
Some of the followers of Zwingli's Reformed church thought that requiring church membership beginning at birth was inconsistent with the New Testament example. They believed that the church should be removed from government, that individuals should join only when willing to publicly acknowledge belief in Jesus and the desire to live in accordance with his teachings. At a small meeting in Zurich on January 21, 1525, Conrad Grebel, Felix Manz, George Blaurock, along with twelve others, baptized each other; this meeting marks the beginning of the Anabaptist movement. In the spirit of the times, other groups came to be, preaching about reducing hierarchy, relations with the state and sexual license, running from utter abandon to extreme chastity; these movements are together referred to as the "Radical Reformation". Many government and religious leaders, both Protestant and Roman Catholic, considered voluntary church membership to be dangerous—the concern of some deepened by reports of the Münster Rebellion, led by a violent sect of Anabaptists.
They joined forces to fight the movement, using methods such as banishment, burning, drowning or beheading. Despite strong repressive efforts of the state churches, the movement spread around western Europe along the Rhine. Officials killed many of the earliest Anabaptist leaders in an attempt to purge Europe of the new sect. By 1530, most of the founding leaders had been killed for refusing to renounce their beliefs. Many believed that God did not condone killing or the use of force for any reason and were, unwilling to fight for their lives; the non-resistant branches survived by seeking refuge in neutral cities or nations, such as Strasbourg. Their safety was tenuous, as a shift in alliances or an invasion could mean resumed persecution. Other groups of Anabaptists, such as the Batenburgers, were destroyed by their willingness to fight; this played a large part in the evolution of Anabaptist theology. They believed that Jesus taught that any use of force to get back at anyone was wrong, taught to forgive.
In the early days of the Anabapt
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