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
A ZIP Code is a postal code used by the United States Postal Service in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan; the basic format consists of five digits. An extended ZIP+4 code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that reference a more specific location; the term ZIP Code was registered as a servicemark by the U. S. Postal Service, but its registration has since expired; the early history and context of postal codes began with postal district/zone numbers. The United States Post Office Department implemented postal zones for numerous large cities in 1943. For example: The "16" was the number of the postal zone in the specific city. By the early 1960s, a more organized system was needed, non-mandatory five-digit ZIP Codes were introduced nationwide on July 1, 1963; the USPOD issued its Publication 59: Abbreviations for Use with ZIP Code on October 1, 1963, with the list of two-letter state abbreviations which are written with both letters capitalized.
An earlier list in June had proposed capitalized abbreviations ranging from two to five letters. According to Publication 59, the two-letter standard was "based on a maximum 23-position line, because this has been found to be the most universally acceptable line capacity basis for major addressing systems", which would be exceeded by a long city name combined with a multi-letter state abbreviation, such as "Sacramento, Calif." along with the ZIP Code. The abbreviations have remained unchanged, with the exception of Nebraska, changed from NB to NE in 1969 at the request of the Canadian postal administration, to avoid confusion with the Canadian province of New Brunswick. Robert Moon is considered the father of the ZIP Code; the post office only credits Moon with the first three digits of the ZIP Code, which describe the sectional center facility or "sec center." An SCF is a central mail processing facility with those three digits. The fourth and fifth digits, which give a more precise locale within the SCF, were proposed by Henry Bentley Hahn Sr.
The SCF sorts mail to all post offices with those first three digits in their ZIP Codes. The mail is sorted according to the final two digits of the ZIP Code and sent to the corresponding post offices in the early morning. Sectional centers do not deliver mail and are not open to the public, most of their employees work the night shift. Mail picked up at post offices is sent to their own SCF in the afternoon, where the mail is sorted overnight. In the case of large cities, the last two digits coincide with the older postal zone number thus: In 1967, these became mandatory for second- and third-class bulk mailers, the system was soon adopted generally; the United States Post Office used a cartoon character, which it called Mr. ZIP, to promote the use of the ZIP Code, he was depicted with a legend such as "USE ZIP CODE" in the selvage of panes of postage stamps or on the covers of booklet panes of stamps. In 1971 Elmira Star-Gazette reporter Dick Baumbach found out the White House was not using a ZIP Code on its envelopes.
Herb Klein, special assistant to President Nixon, responded by saying the next printing of envelopes would include the ZIP Code. In 1983, the U. S. Postal Service introduced an expanded ZIP Code system that it called ZIP+4 called "plus-four codes", "add-on codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an individual high-volume receiver of mail, a post office box, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery. However, initial attempts to promote universal use of the new format met with public resistance and today the plus-four code is not required. In general, mail is read by a multiline optical character reader that instantly determines the correct ZIP+4 Code from the address—along with the more specific delivery point—and sprays an Intelligent Mail barcode on the face of the mail piece that corresponds to 11 digits—nine for the ZIP+4 Code and two for the delivery point.
For Post Office Boxes, the general rule is. The add-on code is one of the following: the last four digits of the box number, zero plus the last three digits of the box number, or, if the box number consists of fewer than four digits, enough zeros are attached to the front of the box number to produce a four-digit number. However, there is no uniform rule, so the ZIP+4 Code must be looked up individually for each box; the ZIP Code is translated into an Intelligent Mail barcode, printed on the mailpiece to make it easier for automated machines to sort. A barcode can be printed by the sender, it is better to let the post office put one on. In general, the post office uses OCR technology, though in some cases a human might have to read and enter the address. Customers who send bulk mail can get a discount on postage if they have printed the barcode themselves and have presorted the mai
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
Arkansas is a state in the southern region of the United States, home to over 3 million people as of 2018. Its name is of Siouan derivation from the language of the Osage denoting their related kin, the Quapaw Indians; the state's diverse geography ranges from the mountainous regions of the Ozark and the Ouachita Mountains, which make up the U. S. Interior Highlands, to the densely forested land in the south known as the Arkansas Timberlands, to the eastern lowlands along the Mississippi River and the Arkansas Delta. Arkansas is the 33rd most populous of the 50 United States; the capital and most populous city is Little Rock, located in the central portion of the state, a hub for transportation, business and government. The northwestern corner of the state, such as the Fayetteville–Springdale–Rogers Metropolitan Area and Fort Smith metropolitan area, is a population and economic center; the largest city in the state's eastern part is Jonesboro. The largest city in the state's southeastern part is Pine Bluff.
The Territory of Arkansas was admitted to the Union as the 25th state on June 15, 1836. In 1861, Arkansas withdrew from the United States and joined the Confederate States of America during the Civil War. On returning to the Union in 1868, the state continued to suffer due to its earlier reliance on slavery and the plantation economy, causing the state to fall behind economically and socially. White rural interests continued to dominate the state's politics until the civil rights movement. Arkansas began to diversify its economy following World War II and relies on its service industry, poultry, tourism and rice; the culture of Arkansas is observable in museums, novels, television shows and athletic venues across the state. People such as politician and educational advocate William Fulbright; the name Arkansas was applied to the Arkansas River and derives from a French term, the plural term for Quapaws, a Dhegiha Siouan-speaking Native American people who settled in Arkansas around the 13th century.
This comes from an Algonquian term, /akansa/, for the Quapaws, is also the root term for Kansas. The name has been spelled in a variety of fashions. In 1881, the pronunciation of Arkansas with the final "s" being silent was made official by an act of the state legislature after a dispute arose between Arkansas's two U. S. senators as one favored the pronunciation as AR-kən-saw while the other favored ar-KAN-zəs. In 2007, the state legislature passed a non-binding resolution declaring that the possessive form of the state's name is Arkansas's, followed by the state government. Arkansas borders Louisiana to the south, Texas to the southwest, Oklahoma to the west, Missouri to the north, Tennessee and Mississippi to the east; the United States Census Bureau classifies Arkansas as a southern state, sub-categorized among the West South Central States. The Mississippi River forms most of Arkansas's eastern border, except in Clay and Greene, counties where the St. Francis River forms the western boundary of the Missouri Bootheel, in many places where the channel of the Mississippi has meandered from its original 1836 course.
Arkansas can be split into two halves, the highlands in the northwest half and the lowlands of the southeastern half. The highlands are part of the Southern Interior Highlands, including The Ozarks and the Ouachita Mountains; the southern lowlands include the Arkansas Delta. This dual split can yield to general regions named northwest, northeast, southeast, or central Arkansas; these directionally named regions are broad and not defined along county lines. Arkansas has seven distinct natural regions: the Ozark Mountains, Ouachita Mountains, Arkansas River Valley, Gulf Coastal Plain, Crowley's Ridge, the Arkansas Delta, with Central Arkansas sometimes included as a blend of multiple regions; the southeastern part of Arkansas along the Mississippi Alluvial Plain is sometimes called the Arkansas Delta. This region is a flat landscape of rich alluvial soils formed by repeated flooding of the adjacent Mississippi. Farther away from the river, in the southeast portion of the state, the Grand Prairie consists of a more undulating landscape.
Both are fertile agricultural areas. The Delta region is bisected by a geological formation known as Crowley's Ridge. A narrow band of rolling hills, Crowley's Ridge rises from 250 to 500 feet above the surrounding alluvial plain and underlies many of the major towns of eastern Arkansas. Northwest Arkansas is part of the Ozark Plateau including the Ozark Mountains, to the south are the Ouachita Mountains, these regions are divided by the Arkansas River; these mountain ranges are part of the U. S. Interior Highlands region, the only major mountainous region between the Rocky Mountains and the Appalachian Mountains; the highest point in the state is Mount Magazine in the Ouachita Mountains, which rises to 2,753 feet above sea level. Arkansas has many rivers and reservoirs within or along its borders. Major tributaries of the Mississippi River include the Arkansas River, the White River, the St. Francis River; the Arkansas is fed by the Mulberry River and the Fou
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
A town is a human settlement. Towns are larger than villages but smaller than cities, though the criteria to distinguish them vary between different parts of the world; the word town shares an origin with the German word Zaun, the Dutch word tuin, the Old Norse tun. The German word Zaun comes closest to the original meaning of the word: a fence of any material. An early borrowing from Celtic *dunom. In English and Dutch, the meaning of the word took on the sense of the space which these fences enclosed. In England, a town was a small community that could not afford or was not allowed to build walls or other larger fortifications, built a palisade or stockade instead. In the Netherlands, this space was a garden, more those of the wealthy, which had a high fence or a wall around them. In Old Norse tun means a place between farmhouses, the word is still used in a similar meaning in modern Norwegian. In Old English and Early and Middle Scots, the words ton, etc. could refer to diverse kinds of settlements from agricultural estates and holdings picking up the Norse sense at one end of the scale, to fortified municipalities.
If there was any distinction between toun and burgh as claimed by some, it did not last in practice as burghs and touns developed. For example, "Edina Burgh" or "Edinburgh" was built around a fort and came to have a defensive wall. In some cases, "town" is an alternative name for "city" or "village". Sometimes, the word "town" is short for "township". In general, today towns can be differentiated from townships, villages, or hamlets on the basis of their economic character, in that most of a town's population will tend to derive their living from manufacturing industry and public services rather than primary industry such as agriculture or related activities. A place's population size is not a reliable determinant of urban character. In many areas of the world, e.g. in India at least until recent times, a large village might contain several times as many people as a small town. In the United Kingdom, there are historical cities; the modern phenomenon of extensive suburban growth, satellite urban development, migration of city dwellers to villages has further complicated the definition of towns, creating communities urban in their economic and cultural characteristics but lacking other characteristics of urban localities.
Some forms of non-rural settlement, such as temporary mining locations, may be non-rural, but have at best a questionable claim to be called a town. Towns exist as distinct governmental units, with defined borders and some or all of the appurtenances of local government. In the United States these are referred to as "incorporated towns". In other cases the town lacks its own governance and is said to be "unincorporated". Note that the existence of an unincorporated town may be set out by other means, e.g. zoning districts. In the case of some planned communities, the town exists in the form of covenants on the properties within the town; the United States Census identifies many census-designated places by the names of unincorporated towns which lie within them. The distinction between a town and a city depends on the approach: a city may be an administrative entity, granted that designation by law, but in informal usage, the term is used to denote an urban locality of a particular size or importance: whereas a medieval city may have possessed as few as 10,000 inhabitants, today some consider an urban place of fewer than 100,000 as a town though there are many designated cities that are much smaller than that.
Australian geographer Thomas Griffith Taylor proposed a classification of towns based on their age and pattern of land use. He identified five types of town: Infantile towns, with no clear zoning Juvenile towns, which have developed an area of shops Adolescent towns, where factories have started to appear Early mature towns, with a separate area of high-class housing Mature towns, with defined industrial and various types of residential area In Afghanistan and cities are known as shār; as the country is an rural society with few larger settlements, with major cities never holding more than a few hundred thousand inhabitants before the 2000s, the lingual tradition of the country does not discriminate between towns and cities. In Albania "qytezë" means town, similar with the word for city. Although there is no official use of the term for any settlement. In Albanian "qytezë" means "small city" or "new city", while in ancient times "small residential center within the walls of a castle"; the center is a population group, larger than a village, smaller than a city.
Though the village is bigger than a hamlet In Australia, towns or "urban centre localities" are understood to be those centers of population not formally declared to be cities and having a population in excess of about 200 people. Centers too small to be called towns are understood to be a township. In addition, some local government entities are styled as towns in Queensland, Western Australia and the Northern Territory, before the statewide amalgamations of th
Judsonia is a city in White County, United States. Ronnie Schlem is the current mayor; the population was 2,019 at the 2010 census. According to the United States Census Bureau, the city has a total area of 3.0 square miles, of which 3.0 square miles is land and 0.04 square miles is water. As of the census of 2000, there were 1,982 people, 733 households, 529 families residing in the city; the population density was 659.5 people per square mile. There were 816 housing units at an average density of 271.5/sq mi. The racial makeup of the city was 94.05% White, 2.32% Black or African American, 0.71% Native American, 0.10% Asian, 0.05% Pacific Islander, 1.31% from other races, 1.46% from two or more races. 2.32% of the population were Hispanic or Latino of any race. There were 733 households out of which 29.9% had children under the age of 18 living with them, 56.8% were married couples living together, 10.9% had a female householder with no husband present, 27.7% were non-families. 25.2% of all households were made up of individuals and 12.7% had someone living alone, 65 years of age or older.
The average household size was 2.48 and the average family size was 2.94. In the city, the population was spread out with 22.5% under the age of 18, 7.7% from 18 to 24, 24.9% from 25 to 44, 22.4% from 45 to 64, 22.6% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 85.2 males. For every 100 females age 18 and over, there were 80.5 males. The median income for a household in the city was $25,660, the median income for a family was $31,176. Males had a median income of $25,774 versus $16,852 for females; the per capita income for the city was $11,891. About 12.0% of families and 15.7% of the population were below the poverty line, including 18.4% of those under age 18 and 20.8% of those age 65 or over. Known as Prospect Bluff, the town was founded in 1840 by Erastus Gregory. In 1871 a Baptist school, Judson University, was established in the area. A few months the name Prospect Bluff was changed to Judsonia, after Baptist missionary Adoniram Judson, to help promote the school, which drew many northerners to the area.
Though the school died in 1883, the town streets still bear the names of several well-known 19th-century Baptists: Judson and Hasseltine, Wayland and Boardman. On the evening of March 21, 1952, tornadoes swept Arkansas leaving 111 dead. Fifty of those fatalities were in the near vicinity, it was reported that the only building in the town not damaged was the Methodist church, which stands today in the city's downtown area along Van Buren Street. "That's Judsonia" by William Ewing Orr. Judsonia is home to a yearly festival called Prospect Bluff Days in honor of the towns origins. Elementary and secondary education is provided by two school districts: Most of the city is within the Riverview School District, including Riverrview Junior High School and Riverview High School in Searcy. Judsonia Elementary School is a part of this district; the Riverview district is the result of a consolidation, effective July 1, 1991, of the Judsonia and Griffithville school districts. A small section of the city is within the White County Central School District, where students attend White County Central High School.
Judsonia residents are served by Baldwin-Kittler Memorial Library, a branch library of the White County Regional Library System. Beth Ditto, musician who grew up in Judsonia Jeremy Gillam, farmer from Judsonia and Republican member of the Arkansas House of Representatives Lonnie Glosson, an early blues harmonica player