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Geography Models

Geography Models. Preparing for the AP Human Geography Exam. Models, Models, Models. Let ’ s review them all!. What do we always say about models?. This is a model Is this what most men & women look like? It ’ s the same way with models in geography…

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Geography Models

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  1. Geography Models Preparing for the AP Human Geography Exam

  2. Models, Models, Models Let’s review them all!

  3. What do we always say about models? • This is a model • Is this what most men & women look like? • It’s the same way with models in geography… • Geography models are simply theoretical representations of the built environment

  4. Johann von Thunen • 1783-1850, German economist who proposed an agricultural model on how farmers choose their crops or animals. • Farmers compare two costs, the cost of the land versus the cost of transporting products to market. • Prepared a model on the spatial arrangement of different crops/animals around the city center.

  5. Von Thunen’s Land Use Model • 1826- von Thunen • According to the model, a commercial farmer initially considers which crops to cultivate and which animals to raise based on market location. • Farmer takes into account two costs: cost of land v. cost of transportation • The goods that are expensive to ship or are perishable will be closer to the central city while the goods that need lots of land or are inexpensive to ship will be farther from the central city.

  6. Von Thunen Agriculture Model • Land rent or cost = Bid Rent • Labor costs • Transport costs (distance to market) • Production costs • The market is a central Isolated State • The Isolated State is surrounded by forest • The terrain is homogeneous, flat, has no rivers or mountains. • Soils/climate are even and consistent • Farmers behave rationally to maximize profits

  7. Location Theory • Distance Decay and Friction of Distance • Predicting where something should be located • This can be on the local, regional, national or global scale • von Thünen looked at locations of primary industries, but secondary industries locations are more complicated • Secondary industry locations include human behaviors and decision making – political, cultural, economic factors • Profit is the primary motivator • Variable Costs – energy, transport, labor and others

  8. 1868-1958, German economic geographer Ideas similar to von Thunen in terms of industrial locations The Least Cost Theory, accounts for the location of a manufacturing plant in terms of the owners desire to minimize three categories of cost – Transportation Labor Agglomeration (when enterprises cluster in the same area and provide assistance to each other through shared talents, services, and facilities). Alfred Weber

  9. Weber’s Least Cost Theory – 3 primary factors of location (to minimize costs) • Transportation – the lowest possible costs in moving raw materials to the factory and the finished product to market • Labor – this reduces profits, therefore owners may want to move farther from raw materials and markets • Agglomeration – like industries clustering in the same area(s) can reduce costs. Existing infrastructure (transport, phones, water, buildings, etc.) • Deglomeration – what happens when too much agglomeration takes place? • Other Factors – political stability, cheap energy, local receptiveness (locating a prison), taxation (exemptions), free land, climate (LA and film industry), local mores (brewery, sex shops, etc.), owner’s local connections to area

  10. Weber’s Least Cost Theory Definition: Model developed according to the location of manufacturing establishments is determined by the minimization of three critical expenses: 1. labor 2. transportation 3. agglomeration (a process involving the clustering or concentrating of people or activities. Often refers to businesses that benefit from proximity because they share skilled-labor pools and technological and financial amenities.)

  11. German geographer Central Place Theory --model that would show how and where central places in the city should be located Used hexagons to determine range and threshold of business/services. Walter Christaller

  12. Christaller looked at the arrangement of urban place and functions. He started trying to model what he saw. \http://myfundi.co.za/e/Settlements_II:_Rural_settlements&usg

  13. Arrangement and Spacing of Urban Places • Circular shapes resulted in unserved or overlapped areas • Hexagons had no gaps or overlaps • This suggests an inverse relationship of higher order and lower order settlements (towns and cities) • Theoretically, settlements will be equidistant from each other • In other words, big towns/cities are farther apart from each other • Why?

  14. Central Place Theory Definition: A theory of Walter Christaller that seeks to explain the relative size and spacing of towns and cities as a function of people’s shopping behavior. It explains how and where central places in the urban hierarchy should be functionally and spatially distributed. The smallest settlements in an urban system will provide only those goods and services that meet everyday needs (bakery and dairy products, and groceries) and that these small settlements will be situated relatively close to one another because consumers, assumed to be spread throughout the countryside, will not be prepared to travel far for such items. On the other hand, people will be willing to travel farther for more expensive, less frequently purchased items usually found in the larger settlements. Range and Threshold are taken into account when deciding where to place a business.

  15. Hotelling’s Modelhttp://www.answers.com/topic/hotelling-model • Concept of Locational Interdependence • Suppose there is a beach a mile long • There are two ice cream vendors • Where would they locate on the beach to maximize their sales?

  16. Hotelling Model on the landscape • http://www.startribune.com/local/south/176188911.html?refer=y

  17. American sociologist of the 1920’s Developed the Concentric Zone Model describing how a city grows outward from a central area in a series of concentric rings – CBD Zone in transition Zone of working class homes Zone of better residences Commuters zone E.W. Burgess

  18. Characteristics of Concentric Zoneen.wikipedia.org/wiki/Ernest_Burgess • Burgess studied 1920s Chicago to make this model • 5 concentric zones • Burgess suggested that immigrants lived in inner zones which caused affluent residents to move farther out • Invasion and Succession • Concentric Zone’s weakness is that it does not allow for change in the city • Concentric Zone does not allow for physical geographic barriers

  19. Concentric Zone Model Definition: A city grows outward from a central city in a series of concentric rings. The rings denote different classes of people. 1st is the CBD 2nd is the zone of transition containing industry and poorer houses 3rd is the working-class zone containing modest homes with working class families 4th is the middle class with newer spacious homes 5th is the commuter zone

  20. Land economist of the late 1930’s Developed a model of city structure based on series of sectors Certain areas of the city are more attractive for various activities, thus as city grows activities expand outward in wedges or sectors from the center – CBD Transportation and industry Low-class residential Middle-class residential High-class residential Homer Hoyt

  21. Hoyt Sector Model • Late 1930s • Answered the drawbacks of Burgess Model • Hoyt said growth created pie-shaped urban structure • Hoyt said his pie-shaped zones could reach from the Core (CBD) to the edge of the city (e.g. low rent sector 3 from CBD to outskirt of city) • Sector Model says that the CBD is not as important as Burgess indicated • Sectors were developed along transport routes (e.g. highways, RRs, etc.)

  22. Sector Model Definition: The city develops in a series of sectors, not rings. As a city grows, activities expand outward in a wedge from the center. Many areas are more attractive for various activities. Social classes are found in sectors of a city, not in the rings from the inside out.

  23. Thomas Malthus • 1766-1834, English economist proposed that the world’s rate of population increase was far outrunning the development of food supplies. • In other words, population is growing geometrically while food is increasing arithmetically.

  24. Malthus’ Principle of Population as it affects the future

  25. Malthus’ Principle of Population as it affects the future • What Malthus said: • population grows geometrically while food production grows arithmetically • according to Malthus, these growth rates would produce the following relationships between food and people in the future: • Today 1 person, 1 unit of food • 25 years from now 2 persons, 2 units of food • 50 years from now 4 persons, 3 units of food • 75 years from now 8 persons, 4 units of food • 100 years from now 16 persons, 5 units of food • these predictions were made just after England became the first country to enter stage 2 of Demographic Transition

  26. Malthus’ Principle of Population as it affects the future Neo-Malthusians: 1. Population growth is increasing greatly in the poorer countries of the world because of medical growth not growth of wealth. They are not increasing their food production as quickly as they are their population 2. Population growth is stripping the world of many valuable resources like energy sources, not just food. • Malthus’ Critics: • Boserup and Kuznets: Population growth could stimulate economic growth and bring about more food production. • Simon: Population stimulated economic growth. More people=more brains to invent things to improve life. • Marxists: No cause-effect relationship between the growth of population and economic development.

  27. Ester Boserup • 1910-1999, Danish economist stated the population growth influences the distribution of types of subsistence farming. • Subsistence farmers increase the supply of food through intensification of production through the … • Adoption of new farming methods • Land is left fallow for shorter periods

  28. E.G. Ravenstein • 1834-1913, 19th century geographer who outlined 11 migration “laws”. • To understand where and why migration occurs, Ravenstein’s “laws” can be organized into three groups… • The reasons why migrants move • The distance the typically move • The characteristics of migrants

  29. Wilbur Zelinsky • 1921 – present, American geographer identified a migration transition which consists of changes in a society comparable to those in the demographic transition. • International migration is a phenomenon of countries in stage 2 of the demographic transition. • Internal migration is more important in stages 3 and 4 of the demographic transition.

  30. Immanuel Wallerstein • 1930 – present, Sociologist • Describes the plight between less developed countries and their relationship with more developed countries, aka World Systems Theory • Describing a dynamic capitalist world economy from the 1500’s onward (feudalism on to colonialism on to capitalism). • The core (capitalist) countries benefit from their relationships with the semi-periphery and periphery – which have varying degrees of dependence on the core.

  31. World Systems Theory • Immanuel Wallerstein • The good news is that each sector is not necessarily static – can move from one sector to another • 3 sectors that we have discussed before – These are relationships between countries – all three types need each other • CORE • SEMIPERIPHERY • PERIPHERY • But, who always wins?

  32. Core-Periphery Model

  33. American geographers of the late 1940’s Developed the Mulitple Nuclei Model of urban structure. A city is a complex structure that includes more than once center around which activities revolve, thus it has several centers or nodes – CBD Wholesale Low-class residential Middle-class residential High-class residential Heavy manufacturing Outlying business district Residential suburb Industrial suburb C.D. Harris and E.L. Ullman

  34. Multiple Nuclei • 1940s • Harris & Ullman hypothesized the CBD was further losing its dominance • CBD no longer the nucleus of the modern city, thus emergence of ‘nuclei’ • Reflects decentralization and then re-nucleation of urban functions • Nuclei are disconnected and do not necessarily rely on each other

  35. Multiple Nuclei Model Definition: A city is a complex structure that includes more than one center around which activities revolve. Examples of these nodes are a port, neighborhood business center, university, airport and park. Some activities are attracted to particular nodes, whereas others try to avoid them like things near universities and airports.

  36. World City ModelsLatin American City Modelhttp://lewishistoricalsociety.com/wiki2011/tiki-read_article.php?articleId=96

  37. Economist of the 1950’s Proposed a five-stage model of development aka Rostow’s Development Model or the International Trade Approach – The traditional society The preconditions for takeoff The takeoff The drive to maturity The age of mass consumption W.W. Rostow

  38. Rostow’s Modernization ModelSometimes called the Ladder of Development • Eurocentric and Americentric • Doesn’t account for regional differences within a country • Doesn’t account for cultural differences within a country • Doesn’t account for one-commodity economies • Neo-colonialism • Major bias that all economies will grow the same way developed countries grew • Rostow believed all countries would grow in an orderly fashion like Japan and Europe and the US did http://www.studyblue.com/notes/note/n/unit-6-vocabulary/deck/5285919

  39. Dependency Theory • Political and economic relationships between countries and regions control and limitdevelopment possibilities • Example – colonialism created… • Dependent relationships between mother country and the occupied country • These relationships sustain prosperity of the core country and poverty of the periphery country • Gives rise to NEOCOLONIALISM in the 1970s, 80s and on to the present

  40. German geographers (1770’s-1859) Urged human geographers to adopt the methods of scientific inquiry used by natural scientists. Concentrated on how the physical environment caused social development and thus Environmental Determinism. Alexander Humboldt & Carl Ritter

  41. French geographer Major contributer to the cultural landscape tradition Cultural landscape geographers argue that each region has its own distinctive landscape that results from a unique combination of social relationships and physical processes. Example – Africa and its political/economic instability tied to its natural resources/physical features/political boundaries. Jean Brunhes

  42. Mackinder’s Heartland Theoryand Spykman’s Rimland Theory

  43. Mackinder’s Heartland Theory and Spykman’s Rimland Theory Heartland Theory: Mackinder believed that a land-based power, not a sea-based power, would ultimately rule the world. He believed that Eurasia was the most important area in the world containing a “pivot area” extending from Eastern Europe to eastern Siberia. The “pivot area” became known as the Heartland. Who rules East Europe rules the Heartland. Who rules the Heartland rules the World Island. Who rules the World Island rules the World. Rimland Theory Spykman believed the Eurasia rim, not its heart, held the key to global power. He parodied Mackinder: Who controls the Rimland rules Eurasia Who rules Eurasia controls the destinies of the world. Spykman saw a divided rimland as a key to the world’s balance of power. Today the rimland includes Western Europe and China

  44. The Demographic Transition

  45. Demographic Transition Model – page 54http://www.geographyalltheway.com/igcse_geography/population_settlement/population/imagesetc/demographic_transition.jpg

  46. Demographic Transitionhttp://envirosci.net/111/population/demographic_phases.jpg

  47. The Demographic Transition Stage One: CBR- very high CDR- very high NIR- low Population Growth: Low Movement from Stage One to Stage Two: MDC- Industrial Revolution LDC- Medical Revolution Stage Two: CBR- very high CDR- plummets NIR- high Population Growth: High Movement from Stage Two to Stage Three: Changes in Social customs and improved technology

  48. Demographic Transition Stage Three: CBR: Drops quickly CDR: Falling put slower than before NIR: slows Population Growth: Moderate Movement from Stage Three to Stage Four: greater gender equity, more women working and improved birth control Stage Four: CBR: low CDR: low NIR: low Population Growth: Low

  49. Demographic Transition Examples of Countries and Regions of each stage of demographic transition: Stage One: None Stage Two: Sub-saharan Africa Nigeria, Sierra Leon, Cape Verde Stage Three: East Asia, Latin America, Middle East China, Brazil, Mexico, Saudi Arabia, Chile Stage Four: Western Europe United Kingdon, Demnark

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