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
U.S. Route 67
U. S. Route 67 is a major north–south U. S. highway. The southern terminus of the route is at the United States-Mexico border in Presidio, where it continues south as Mexican Federal Highway 16 upon crossing the Rio Grande; the northern terminus is at U. S. Route 52 in Sabula, Iowa. US 67 crosses the Mississippi River twice along its routing; the first crossing is at West Alton, where US 67 uses the Clark Bridge to reach Alton, Illinois. About 240 miles to the north, US 67 crosses the river again at the Rock Island Centennial Bridge between Rock Island and Davenport, Iowa. Additionally, the route crosses the Missouri River via the Lewis Bridge a few miles southwest of the Clark Bridge. Throughout Texas, US 67 runs in a northeast–southwest manner violating the norms for numbering U. S. highways as odd-numbered routes are north–south in orientation, because prevailing north–south versus prevailing east–west designation is determined by the ultimate termini as the route traverses multiple states. US 67 is part of the La Entrada al Pacifico international trade corridor from its southern terminus to an intersection with U.
S. Route 385 in McCamey. Between Dallas and Weaver in eastern Hopkins County, the highway runs concurrently with Interstate 30, is unsigned between Dallas and Royse City. From Weaver east to the Arkansas state line in Texarkana, US 67 runs parallel to I-30. East of the Interstate 35E/Interstate 30 "mixmaster" in Downtown Dallas, U. S. Route 67 follows Interstate 30. West of the "mixmaster," U. S. 67 follows I-35E south through Oak Cliff. Along this portion, the Route 67 shield is alongside the Interstate shield. Just north of Kiest Boulevard, U. S. Route 67 breaks off from Interstate 35E and maintains controlled-access status down to Midlothian, where it becomes a four-lane divided highway to the western edge of Cleburne; the route from Alpine to San Angelo was a previous route of SH 99. Though it passes through the heart of the Ozarks, the highest elevation along US 67 is the last 150 miles between Fort Stockton and Presidio. Below Fort Stockton, US 67 passes near the Glass Mountains and the Sierra Del Norte range at 6810 ft. West of Alpine, US 67 passes near the Twin Sisters, Ranger Peak, Paisano Peak before going through Paisano Pass.
East of Marfa are views of Twin Mountains, Goat Mountain, Cathedral Peak, Cienega Mountain. The Puertacitas Mountains and the Davis Mountains can be seen from the Marfa Ghost Lights observatory to the north; the Davis Mountains are the highest elevation near US 67. Thirty miles south of Marfa, US 67 reaches its highest point at 5428 ft, with Chinatti Peak seen to the southwest. In Arkansas, US 67 runs parallel with Interstate 30 from Texarkana to Benton, where it runs concurrently with I-30 to North Little Rock, it runs on a freeway north to US 412 in Walnut Ridge, where the freeway ends and the road becomes a five-lane undivided highway to Pocahontas. After Pocahontas, the road returns to a two-lane alignment north to the state line. In 2009, a bill was introduced to rename the portion of US 67; the bill, by Rep. J. R. Rogers of Walnut Ridge, designates US 67 in Jackson and Randolph Counties as "Rock'n' Roll Highway 67." Besides Elvis Presley and Johnny Cash, the bill notes that Roy Orbison, Jerry Lee Lewis, Fats Domino played at clubs along that stretch of highway.
Going from south to north, US 67 enters Missouri at the Arkansas state line. About 10 miles north of the state line, it intersects US 160. At the southwest corner of Poplar Bluff, Business Route 67 goes into Poplar Bluff while US 67 bypasses Poplar Bluff to the west on a freeway-grade highway, it joins US 60 at the northwest corner of Poplar Bluff. Both 60 and 67 follow a four-lane route to an interchange about 6 miles northwest of Poplar Bluff, where US 60 heads west toward Springfield, while US 67 heads north to St. Louis. Construction is complete to divide the highway through Wayne and Butler Counties, including bypasses around Greenville and Cherokee Pass; the new divided highway opened on August 2011, with a ribbon-cutting ceremony. Additionally, MoDOT has extended the divided highway south to US 160 south of Poplar Bluff. From Fredericktown, US 67 passes through Farmington, where an existing interchange with Route 221 was converted to a diverging diamond interchange in September 2012. US 67 proceeds through Park Hills and Bonne Terre.
About 25 miles north of Bonne Terre, US 67 crosses Interstate 55 and enters Festus and Crystal City and picks up US 61. This becomes known as Truman Boulevard in Festus and Crystal City, Highway 61-67 from Herculaneum to Imperial, Jeffco Boulevard from Arnold until it exits Jefferson County and enters St. Louis County, over the Meramec River where it becomes Lemay Ferry Road; when US 67/61 reaches St. Louis County, It travels Lemay Ferry Road until it reaches Lindbergh Boulevard. There, it overlaps Lindbergh Boulevard. US 61 turns west onto I-64/US 40 West towards Wentzville. Lindbergh, named for aviator Charles Lindbergh, continues north through Frontenac, Creve Coeur, Maryland Heights, Bridgeton and Florissant until it reaches Lewis & Clark Boulevard. From there, it continues straight north to West Alton and crosses the Mississippi River on the Clark Bridge and enters Alton, Illinois; the only vehicular tunnel in Missouri is located on US 67 at St. Louis Lambert International Airport, where the road
Gurdon is a city in Clark County, United States. The population was 2,212 at the 2010 census; the town was founded in the late nineteenth century as a railroad town for the timber industry on the St. Louis, Iron Mountain and Southern Railway. Settled in 1873, the city was incorporated in 1880; the town's name derives from railroad executive Henry Gurdon Marquand's middle name. Gurdon is the birthplace of the Concatenated Order of Hoo-Hoo, in 1892. Gurdon is located in southern Clark County at 33°54′55″N 93°9′19″W. U. S. Route 67 passes through the city, leading northeast 15 miles to Arkadelphia, the county seat, southwest 16 miles to Prescott. According to the United States Census Bureau, the city has a total area of 2.5 square miles, of which 2.5 square miles is land and 0.077 square miles, or 2.88%, is water. As of the 2010 United States Census, there were 2,212 people residing in the city; the racial makeup of the city was 46.7% White, 37.5% Black, 0.1% Native American, 0.1% Asian, <0.1% Pacific Islander, <0.1% from some other race and 1.2% from two or more races.
14.3% were Hispanic or Latino of any race. At the 2000 census, there were 2,276 people, 934 households and 625 families residing in the city; the population density was 908.0 per square mile. There were 1,077 housing units at an average density of 429.7 per square mile. The racial makeup of the city was 60.24% White, 35.76% Black or African American, 0.13% Native American, 0.04% Asian, 0.04% Pacific Islander, 3.12% from other races, 0.66% from two or more races. 4.35% of the population were Hispanic or Latino of any race. There were 934 households of which 32.8% had children under the age of 18 living with them, 44.9% were married couples living together, 18.7% had a female householder with no husband present, 33.0% were non-families. 30.2% of all households were made up of individuals and 13.9% had someone living alone, 65 years of age or older. The average household size was 2.44 and the average family size was 3.01. 27.9% of the population were under the age of 18, 9.7% from 18 to 24, 26.6% from 25 to 44, 20.2% from 45 to 64, 15.6% who were 65 years of age or older.
The median age was 35 years. For every 100 females, there were 85.9 males. For every 100 females age 18 and over, there were 82.0 males. The median household income was $26,446, the median family income was $33,564. Males had a median income of $25,479 versus $18,158 for females; the per capita income for the city was $15,043 About 14.1% of families and 19.0% of the population were below the poverty line, including 27.1% of those under age 18 and 16.8% of those age 65 or over. Elementary and secondary education is provided by the Gurdon School District, which leads students to graduate from Gurdon High School; the school's mascot is the Go-Devil with gold as the school colors. Gurdon is supported by the Cabe Public Library, a branch library of the Clark County Library System; the town is known for the "Gurdon Light", a series of unexplained phenomena which occur in a wooded area by railroad tracks. Viewers have reported a light or lights hovering in mid-air. Local folk legend explains the light appearances as a deceased railwayman's lantern.
Scientific work on the origin of the lights has proven inconclusive. The light has been featured on the TV show Unsolved Mysteries. Jimmy Witherspoon, a blues artist, grew up there, his performances were recorded on more than 200 albums, he established himself as a jazz-influenced bluesman. Daniel Davis, grew up in Gurdon, he is best known for playing the role of Niles the butler in the CBS sitcom The Nanny. Davis' natural accent is Southern American. Speaking with an English accent in his role as Niles, he was believed to be English by many viewers. Tav Falco, a musical performer, performance artist, actor and photographer, was raised in Gurdon. List of cities in Arkansas "Gurdon, Clark County", Encyclopedia of Arkansas History & Culture Nash-Arnott shootout Gurdon Chamber of Commerce The Gurdon Times
Arkadelphia is a city in Clark County, United States. As of the 2010 census, the population was 10,714; the city is the county seat of Clark County. It is situated at the foothills of the Ouachita Mountains. Two universities, Henderson State University and Ouachita Baptist University, are located there. Arkadelphia was incorporated in 1857; the site was settled in about 1809 by John Hemphill, operator of a nearby salt works, Arkansas's first industry. It was known as Blakelytown until 1839. Origin of the name "Arkadelphia" is uncertain. One possibility is that it was formed by combining Ark- from the state's name Arkansas and adelphia from the Greek meaning "brother/place". Another explanation of the name is a combination of "adelphia" for place and "arc." Arkadelphia was once known as the "City of Rainbows" because the humid climate resulted in rain. Arkadelphia is located in northeastern Clark County at 34°7′19″N 93°3′58″W, on the west bank of the Ouachita River. According to the United States Census Bureau, the city has a total area of 7.3 square miles, of which 7.3 square miles is land and 0.04 square miles, or 0.49%, is water.
The climate is characterized by hot, humid summers and mild to cool winters. According to the Köppen climate classification system, Arkadelphia has a humid subtropical climate, abbreviated "Cfa" on climate maps; as of the 2010 United States Census, there were 10,714 people residing in the city. The racial makeup of the city was 64.0% White, 30.0% Black, 0.4% Native American, 0.8% Asian, <0.1% Pacific Islander, 0.1% from some other race and 1.4% from two or more races. 3.2% were Hispanic or Latino of any race. As of the census of 2000, there were 10,912 people, 3,865 households, 2,187 families residing in the city; the population density was 1,486.2 people per square mile. There were 4,216 housing units at an average density of 574.2 per square mile. The racial makeup of the city was 68.98% White, 26.51% Black or African American, 0.53% Native American, 1.29% Asian, 0.05% Pacific Islander, 1.35% from other races, 1.28% from two or more races. Hispanic or Latino of any race were 2.59% of the population.
There were 3,865 households out of which 27.0% had children under the age of 18 living with them, 38.6% were married couples living together, 15.3% had a female householder with no husband present, 43.4% were non-families. 31.7% of all households were made up of individuals and 13.7% had someone living alone, 65 years of age or older. The average household size was 2.26 and the average family size was 2.87. In the city, the age distribution of the population shows 18.1% under the age of 18, 32.9% from 18 to 24, 20.4% from 25 to 44, 14.5% from 45 to 64, 14.1% who are 65 years of age or older. The median age was 24 years. For every 100 females, there were 85.6 males. For every 100 females age 18 and over, there were 82.4 males. The median income for a household in the city was $26,651, the median income for a family was $42,479. Males had a median income of $30,152 versus $19,459 for females; the per capita income for the city was $13,268. About 19.8% of families and 23.2% of the population were below the poverty line, including 25.8% of those under the age of 18 and 15.9% of those 65 and older.
Major factors in Arkadelphia's economy are manufacturing. Ouachita Baptist University, Henderson State University, Arkadelphia School District employ many people in the education sector; the manufacturing sector consists of Alumacraft Boat Co. Danfoss Scroll Technologies LLC, Georgia Pacific, Siplast; the economy includes small-scale businesses, including fast-food restaurants. The city is served by The Siftings Herald. Opened in 2011, the Arkadelphia Arts Center hosts exhibits and educational workshops for many organizations in town, including the Caddo River Art Guild, the Poet and Writer's Guild, the Little Theatre, the two universities, Arkadelphia School District. Henderson State University holds plays and musical performances in Arkansas Hall located on campus. Ouachita Baptist University displays student sculpture in the Hammons Gallery. OBU performing arts take place in the OBU Jones Performing Arts Center on Ouachita Street; the Clark County Historical Museum contains artifacts from prehistoric times through today in an attempt to document the history of the county.
Based in the former Amtrak station, a historic tour through Arkadelphia, including the historic James E. M. Barkman House; the Captain Henderson House is a historic bed and breakfast owned and operated by Henderson State University and inhabited by the university's namesake. Downtown Arkadelphia includes the Arkadelphia Commercial Historic District, the Arkadelphia Confederate Monument, Clark County Courthouse, the Clark County Library, all listed on the National Register of Historic Places. Other family attractions include the Diamond Lakes Regional Visitors Center on Highway 7 near I-30, the Reynolds Science Center Planetarium, open to the public during the academic year, is located on the Henderson State University campus. Arkadelphia Parks and Recreation Department operates facilities and manages activities for the community. Within Feaster Park, the department operates Arkadelphia Aquatic Park, which features water slides and diving areas; the park includes a recreation center that has an indoor basketball/volleyball court, a weight lifting area and an elevated walking track.
In 2013, the department completed construction of DeSoto Bluff Trail, which overlooks the Ouachita River. DeGray Lake Resort State Park surrounds 13,800-acre DeGray Lake, located 8 miles northwest of Arkadelphia, on Arkansas Sc
A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is used in Canada, Romania and the United States. County towns have a similar function in the United Kingdom and Republic of Ireland, in Jamaica. In most of the United States, counties are the political subdivisions of a state; the city, town, or populated place that houses county government is known as the seat of its respective county. The county legislature, county courthouse, sheriff's department headquarters, hall of records and correctional facility are located in the county seat though some functions may be located or conducted in other parts of the county if it is geographically large. A county seat is but not always, an incorporated municipality; the exceptions include the county seats of counties that have no incorporated municipalities within their borders, such as Arlington County, Virginia. Ellicott City, the county seat of Howard County, is the largest unincorporated county seat in the United States, followed by Towson, the county seat of Baltimore County, Maryland.
Some county seats may not be incorporated in their own right, but are located within incorporated municipalities. For example, Cape May Court House, New Jersey, though unincorporated, is a section of Middle Township, an incorporated municipality. In some of the colonial states, county seats include or included "Court House" as part of their name. In the Canadian provinces of Prince Edward Island, New Brunswick, Nova Scotia, the term "shire town" is used in place of county seat. County seats in Taiwan are the administrative centers of the counties. There are 13 county seats in Taiwan, which are in the forms of county-administered city, urban township or rural township. Most counties have only one county seat. However, some counties in Alabama, Georgia, Kentucky, Mississippi, New Hampshire, New York, Vermont have two or more county seats located on opposite sides of the county. An example is Harrison County, which lists both Biloxi and Gulfport as county seats; the practice of multiple county seat towns dates from the days.
There have been few efforts to eliminate the two-seat arrangement, since a county seat is a source of pride for the towns involved. There are 36 counties with multiple county seats in 11 states: Coffee County, Alabama St. Clair County, Alabama Arkansas County, Arkansas Carroll County, Arkansas Clay County, Arkansas Craighead County, Arkansas Franklin County, Arkansas Logan County, Arkansas Mississippi County, Arkansas Prairie County, Arkansas Sebastian County, Arkansas Yell County, Arkansas Columbia County, Georgia Lee County, Iowa Campbell County, Kentucky Kenton County, Kentucky Essex County, Massachusetts Middlesex County, Massachusetts Plymouth County, Massachusetts Bolivar County, Mississippi Carroll County, Mississippi Chickasaw County, Mississippi Harrison County, Mississippi Hinds County, Mississippi Jasper County, Mississippi Jones County, Mississippi Panola County, Mississippi Tallahatchie County, Mississippi Yalobusha County, Mississippi Jackson County, Missouri Hillsborough County, New Hampshire Seneca County, New York Bennington County, Vermont In New England, the town, not the county, is the primary division of local government.
Counties in this region have served as dividing lines for the states' judicial systems. Connecticut and Rhode Island have no county level of thus no county seats. In Vermont and Maine the county seats are designated shire towns. County government consists only of a Superior Court and Sheriff, both located in the respective shire town. Bennington County has two shire towns. In Massachusetts, most government functions which would otherwise be performed by county governments in other states are performed by town or city governments; as such, Massachusetts has dissolved many of its county governments, the state government now operates the registries of deeds and sheriff's offices in those counties. In Virginia, a county seat may be an independent city surrounded by, but not part of, the county of which it is the administrative center. Two counties in South Dakota have their county seat and government services centered in a neighboring county, their county-level services are provided by Fall River Tripp County, respectively.
In Louisiana, divided into parishes rather than counties, county seats are referred to as parish seats. Alaska is divided into boroughs rather than counties; the Unorganized Borough, which covers 49 % of Alaska's area, has equivalent. The state with the most counties is Texas, with 254, the state with the fewest counties is Delaware, with 3. County seat war Administrative center County town, administrative centres in Ireland and the UK Chef-lieu, administrative centres in Algeria, Luxembourg, France and Tunisia Municipality, equivalent to county in many c
Okolona is a town near the western edge of Clark County, United States. The population was 147 at the 2010 census; the Battle of Elkin's Ferry of the Civil War was fought here during April 3–4, 1864, as a part of the Camden Expedition. Union forces, led by Maj. Gen. Fred Steele, sought to ford the Little Missouri River, as the local roads were impassable; the force reached Elkin's Ferry before the Confederate cavalry brigades, led by Brig. Gen. John S. Marmaduke, the Confederates were defeated. Okolona has several churches. Okolona is located in western Clark County at 34°0′2″N 93°20′15″W. Arkansas Highway 51 passes through the community, leading northeast 21 miles to Arkadelphia, the county seat, south 8 miles to Interstate 30. According to the United States Census Bureau, the town has a total area of 0.77 square miles, all land. As of the census of 2000, there were 160 people, 70 households, 45 families residing in the town; the population density was 79.2/km². There were 86 housing units at an average density of 42.6/km².
The racial makeup of the town was 68.12% White and 31.88% Black or African American. There were 70 households out of which 22.9% had children under the age of 18 living with them, 57.1% were married couples living together, 5.7% had a female householder with no husband present, 35.7% were non-families. 34.3% of all households were made up of individuals and 12.9% had someone living alone, 65 years of age or older. The average household size was 2.29 and the average family size was 2.96. In the town, the population was spread out with 20.0% under the age of 18, 9.4% from 18 to 24, 24.4% from 25 to 44, 24.4% from 45 to 64, 21.9% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 100.0 males. For every 100 females age 18 and over, there were 91.0 males. The median income for a household in the town was $30,833, the median income for a family was $35,000. Males had a median income of $30,500 versus $17,500 for females; the per capita income for the town was $14,318.
None of the families and 0.6% of the population were living below the poverty line. Public education for elementary and secondary school students is provided by the Gurdon School District with area students graduating from Gurdon High School, it was served by the Okolona School District until that district was dissolved on July 1, 1987. The Gurdon district was one of several absorbing territory from the former Okolona district. List of towns in Arkansas Media related to Okolona, Arkansas at Wikimedia Commons
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