Donald Poland, MS, AICP Introduction Introduction to Geography Lecture Notes Chapter 1 The Nature of Geography z z Geography as the spatial science The study of spatial variation z How & why things differ from place to place on the surface of the earth Spatial z Essential modifier z z z Meaning z z z Location z Absolute Location z z z Latitude & longitude Other grid systems Relative Location z The way things are distributed The way movements occur The way processes operate over the whole or part of the earth’s surface Site & Situation z Mathematical location z “Spatial behavior” “Spatial process” Site z z The physical & cultural characteristics & attributes of the place itself Situation z The external relations of a locale Spatial interconnection & interdependence 1 Direction z Absolute Direction z z z Physical Attributes z Climate, soil, water supply, mineral resources, terrain features z z z z Uniformity in one or a limited number of related physical or cultural features z Time “20 minutes from here” Places z z Attributes of places are always changing Interrelations between places z z z z Accessibility Connectivity Spatial diffusion Globalization “cultural landscape” Areas of spatial similarity Formal Regions z Standard units such as miles or kilometers z “natural landscape” Regions z Relative Distance Language, religion, agricultural patterns, food, music z z z Cultural Attributes z z Absolute Distance “Out West” “Back East” Physical & Cultural Attributes z z Cardinal points (N,S,E,&W) Relative Direction z Distance Geography Themes & Standards z z z Five Fundamental Themes National Standards Four Traditions “Columbia Plateau” or “The Corn Belt” Functional Regions z A spatial system z Trade areas or transportation networks 2 Five Fundamental Themes z z z z z Location Place Relationships within places Movement Regions Four Traditions z z z z Earth-Science Tradition Culture-Environment Tradition Locational (or Spatial) Tradition Area Analysis (or Regional) Tradition Maps Fig.1.14 The Grid System z z z z Poles Equator Latitude Longitude Chapter 2 Latitude z Angular distance north or south of the equator Measured in degrees z Each degree of latitude = 69 miles z z z z z 0°-90° North or South Slightly longer near the poles Slightly shorter near equator Minutes (’) 1.15 miles & seconds (”) 101 feet 3 Latitude (Continued) z Prime Meridian z z z Longitude z Passes through the Royal Observatory at Greenwich, England Selected at an International Conference in 1884 Angular distance east or west of the Prime Meridian z z Other meridians z z True N-S lines connecting the poles Farthest apart at equator z z Distance between lines decreases towards the poles Time depends on longitude z Map Projections z z Transforming a globe surface to a flat surface always results in distortion Properties of Map Projections z z z z Area Shape Distance Direction Shape z z z No map can provide correct shape for large areas, but some can accurately portray shapes for small areas Maps that have true shapes are known as conformal A map cannot be both conformal and equivalent (equal-area) 0°-180° East or West International Date Line generally follows the 180th meridian Each time zone ≈ 15° of longitude Area z z Equal-area or equivalent projections represent areas in correct proportion to the earth’s area But, the shape of the area is distorted to achieve this z See Figure 2.5 Distance z Distance relationships are almost always distorted on a map z Some maintain true distances along one direction or along certain lines z Equidistant projections show true distances in all directions, but only from one or two central points z A map cannot be both equidistant and equalarea z See Figure 2.9 4 Direction z z z Directions between all points cannot be shown without distortion Azimuthal projections enable a map user to measure the distance from a single point to any other point Azimuthal projections may also be equivalent, conformal, or equidistant Types of Projections z Globe properties z z z z z z Cylindrical Projections z Mercator Projection z A lot of distortion towards the poles z z z z z z z Conic Projections z z Shapes are fairly accurate, but areas are widely distorted Plane tangent to the surface Planar projections are equidistant from the tangent point Commonly used for polar areas Gnomonic projections show all great circles as straight lines The cone is closest in form to ½ of a globe Conic projections are widely used to depict hemispheres or smaller parts of the earth z Great Circle Rhumb lines – straight line is true compass bearing – the only projection Planar Projections All meridians are equal in length All meridians converge at the poles Lines of latitude are parallel to the equator and to each other Parallels decrease in length as one nears the poles Meridians and parallels intersect at right angles The scale on the surface of the globe is the same everywhere in all directions See Figure 2.6a Other Projections z z z Goode’s Homolosine Robinson Ovals, hearts, trapezoids, stars, etc. 5 Scale z z Ratio between the measurement of something on a map and the corresponding measurement on the earth Represented in three ways z z z Topographic z z z z z z Very detailed Very generalized Types of Maps (continued) z Thematic Maps z z z Point symbols z Dot density z Proportional circles Area symbols z Usually different colors or patterns z Choropleth maps Line symbols z Non quantitative, such as roads z Quantitative, such as isolines z Flow-line maps Satellite Imagery z Landsat z First launched 1972 z Orthophotomaps False-color images Nonphotographic imagery z z Shaded relief Detecting the nature of an object from a distance Aerial photography z z NRCAN in Canada Remote Sensing z Small-scale maps show large areas Contour lines & intervals z z z Surface areas in relatively high detail Physical & human features USGS quadrangles z z Large-scale maps show a small area 1:25,000 or 1/25,000 Types of Maps z z Verbally Graphically Representative fraction (RF) z z Scale (continued) z z z 1 hour 40 minute orbit Earth coverage every 16 days 50 ft. resolution SPOT Thermal scanners Radar Satellites 6 Geographic Information Systems (GIS) z Five major components z z z z z Data input Data management Data manipulation Analysis functions Data output Physical Geography: Landforms Chapter 3 Igneous Rocks z Cooling & solidification of molten rock z z z z Underground molten rock is magma Above ground molten rock is lava Composition of magma & lava + cooling rate determines the minerals that form Granite, basalt, pumice, obsidian Civilian Spy Satellites z Do you think that the availability of the new, detailed satellite images is a potential threat to national security? Might access to images of their enemies make belligerent countries more dangerous than they already are? Why or why not? z In what ways might access to satellite imagery stem the tides of environmental and social destabilization and foster peace. z Should the federal government, which licenses the satellites, be allowed to exercise “shutter control”, cutting off image sales during wartime? Why or why not? Earth Materials z z z Igneous Rocks Sedimentary Rocks Metamorphic Rocks Sedimentary Rocks z z z z z z Composed of particles of gravel, sand, silt, & clay Pressure & cementing processes cause rocks to form Large particles form conglomerates Sand forms sandstone Silt & clay form shale or siltstone Organic materials form limestone or coal 7 Metamorphic Rocks z Formed from igneous or sedimentary rocks by earth forces that produce heat, pressure, or chemical reactions z z z Shale becomes slate Limestone can become marble Granite may become gneiss Movements of the Continents z z z z Plate tectonics theory Earth’s crust is outer, lighter portion of the lithosphere Lithosphere broken into 12 large and numerous small plates that slide & drift over the asthenosphere Plate movement may be caused by convection Convergent Movement z Convergent plates can cause deep-sea trenches and continental-scale mountain ranges z z z Heavy, but thin, oceanic crust tends to be forced under continental crust Deep trenches form at these subduction zones Volcanoes and earthquakes are common in subduction zones z Geologic Time z z z Earth formed 4.7 billion years ago Current landforms are often millions of years old Early 20th century work by geologist Alfred Wegener on continental drift helped to explain how landforms developed over time Plate Boundaries z Divergent plate boundaries z Transform boundaries z Convergent boundaries z Plate collisions can cause earthquakes along faults z z z Plates move away from each other Plates slide by each other horizontally Plates move towards each other Tectonic Forces z Diastrophism z z Great pressure causing plates to fold, twist, warp, break, and compress Volcanism z The force that transports heated material to or toward the earth’s surface For example, the Ring of Fire 8 Diastrophism z z z Broad warping Folding Faulting z z z z Reduction of the land’s surface Types z z z z Strato or composite volcano z Shield volcano z z Escarpments Rift valleys Tsunami Gradational Processes z Volcanism Weathering Mass movement Erosion z z Mechanical z z z z z z z “Mass wasting” Downslope movement of material due to gravity Accumulation of rock particles at the base of hills is talus Frost action Salt crystals Root action Chemical z z Gentle slopes No explosion Weathering z Mass Movement Steep sides Oxidation Hydrolysis Carbonation Erosional Agents & Deposition z Running water z z z z Amount of precipitation Length & steepness of the slope Kind of rock & vegetation Forms landscapes such as deltas 9 Stream Landscapes z Humid areas z z z z Waterfalls V-shaped channels Floodplains Meandering streams z Oxbow lakes, natural levees, flooding z Groundwater Arid areas z z z z z Lack of vegetation increases erosional forces Temporary lakes Alluvial fans Deep, straight-sided arroyos (wadi) Buttes & mesas Glaciers z z z Covered a large part of the planet only 1015,000 years ago Large body of ice moving down a slope or spreading outward on a land surface Can move as much as 1 meter per day z Aquifers form in zone of saturation z Can dissolve soluble materials to form stalactites, stalagmites, & sinkholes Karst topography z z Glacial Landforms z z z z z z z Waves z z z Forms beaches & spits U-shaped valleys Fiords Tarns Cirques Arêtes Outwash plain Moraines Wind z Abrasive action of sand & dust sculpts the landscape Dunes z Loess z Longshore currents z z Deposition & erosion Sandbars Glacial troughs z z Waves, Currents, & Coastal Landforms Upper zone is the water table z Barchan Coral reefs & atolls z Formed by the secretion of calcium carbonate by coral organisms in sunny, warm water areas 10 Landform Regions z Physical Geography: Weather & Climate A large section of the earth’s surface where a great deal of homogeneity occurs Chapter 4 Air Temperature Solar energy z z Insolation Sun angle Number of daylight hours Amount of water vapor Cloud cover Land vs. water Elevation above sea level Degree & direction of air movement z z 1. 2. 3. 4. 5. Reflection & Reradiation z z z Clouds & light surfaces reflect energy Reradiation also contributes to lost energy Water stores more energy than land z z Land heats & cools more rapidly Water heats & cools more slowly Earth inclination z z z Axis of the earth tilts at ≈ 23.5° Rotation once every 24 hours 21 June / summer solstice z z z 21 December / winter solstice z z Vertical rays of the sun at 23.5 ° N z Tropic of Cancer Northern hemisphere tilted towards the sun Vertical rays of the sun at 23.5 ° S z Tropic of Cancer Equinoxes on March 21 & September 21 The Lapse Rate z 6.4°C per 1000 meters z Temperature inversions z z 3.5°F per 1000 feet Cooler air trapped below warmer air z Can contribute to smog problems 11 Air Pressure & Winds z Air pressure is higher near the earth’s surface z z z Pressure measured by a barometer z Warm air rises Cool air sinks Global Air-Circulation Pattern z z z z z Equatorial low pressure Northeast trades Westerlies Subpolar low Polar easterlies Polar high Moisture in the Atmosphere z Precipitation z z z Rain, sleet, snow, or hail Supersaturation leads to droplets if condensation nuclei are present Relative humidity z A percentage measure of moisture content of the air, expressed as the amount of water vapor present relative to the maximum that can exist at the current temperature Land & sea breezes z z z z Warmer air over land replaced by cooler air over water Mountain & valley breezes z Pressure gradient forces air to blow from high to low pressure areas Convection z z z Cooler air in mountains sinks into valley (often at night) Warmer air in valleys rises into mountains (often during the day) Coriolis effect z Wind veers towards the right in the Northern Hemisphere and to the left in the Southern Hemisphere Ocean Currents z z z z Roughly corresponds to global wind direction patterns Differences in water density also cause movement Coriolis effect Landmasses are a barrier to currents Types of Precipitation z Convectional precipitation z Orographic precipitation z Cyclonic, or frontal precipitation z z z z Results from rising, heated, moisture-laden air Warm air is forced to rise by hills or mountains Where cool and warm air masses meet Air Masses: Large bodies of air with similar temperature and humidity – Leading edge of an air mass as it moves is a front 12 Storms z z Midlatitude cyclones Hurricanes z z z Soil Properties Composition z Organic & inorganic Texture z z A generalization based on daily & seasonal weather conditions Typhoons Variation in soil types due to five major factors z Geology – Underlying rock z Climate – Effects of temperature & precipitation z Topography – Elevation of land & slope z Biology – Living & dead plants & Animals z Time – Length of time the four above factors have been interacting z z Blizzards Tornadoes Soil Formation z Climate Proportion of sand, silt, & clay Structure z Size, shape, and alignments of clumps Soil Profile & Horizons z z z z z z O-horizon – Surface layer – organic manterial A-horizon – Fertile topsoil E-horizon – Water removes minerals/lighter B-horizon – deposits from the E-horizon C-horizon – Were weathering erodes bedrock R-horizon – Bedrock - unaltered Natural Vegetation z Natural Vegetation Regions z z z z z z Soil Classification z z Tropical rain forest Mediterranean or chaparral Semidesert Desert Prairie / steppe Deciduous woodlands Coniferous woodlands Tundra 13 Climate Classification z z z z z z z z Köppen Climate Types z Tropical Climates (A) A - Tropical B – Semidesert & Dryland C – Humid Midlatitude D – Humid Midlatitude E – Arctic & Subarctic H - Highlands Tropical Rain Forest (Af) Savanna (Aw,Am) Dryland Climates z z Hot Deserts (BWh) Midlatitude Deserts & Semideserts (BWk, BS) z Humid Midlatitude Climates z Mediterranean (Cs) z z z z Climate Change z Cold, wet winters & dry, hot summers z Humid Subtropical (Cfa) Marine West Coast (Cfb) Humid Continental (Dfa,Dfb) The Geography of Natural Resources Chapter 5 Steppe Long cycles Quicker changes z z z Small changes in upper-air wind movements Volcanic eruptions Human activity Resource Terminology z Renewable resources z Nonrenewable resources Resource reserves z z z Potentially renewable resources Proven reserves 14 Nonrenewable Energy Resources z z z z z Crude Oil Coal Natural Gas Oil Shale & Tar Sands Nuclear Energy z Geography & Public Policy z Which of the following Statements do you agree with: (from text) z Do you think Congress should raise CAFÉ standards? Should SUV’s and minivans be subject to less stringent standards than passenger cars? Do you think SUV’s should be exempt from the Fuel Standards? z Fission vs. fusion z Renewable Energy Resources z Biomass Fuels z z z z z z Wood Waste z z z Dammed Trouble z Questions in Book Hydroelectric Power Solar Geothermal Wind Food Resources z Geography & Public Policy Food is plentiful but poorly distributed worldwide Shortages can lead to malnutrition, which can have health, social, and political consequences Expansion of cultivated areas z z Most of the planet is not suitable Much of available land is in tropical rainforest areas Food Resources (continued) z Increasing yields z z z z z Wheat, rice, & corn are key Improved yields account for most of the gains in food supply since the 1950s Increasing yields is more costly Yields in many irrigated or fertilized areas have already been maximized Increasing fish consumption may help solve widespread protein deficiencies 15 Land Resources z z z Resource Management Soils Wetlands Forests z z z Environmentally sustainable economies z z z Domestic forests Tropical forests z z Soil erosion cannot exceed formation Forest destruction cannot exceed regeneration Species extinction cannot exceed evolution Fish catches cannot exceed the regenerative capacity of fisheries Pollutants cannot exceed the capacity of the system to absorb them Population Geography Population Geography z Focuses on the number, composition, and distribution of human beings in relation to variations in the conditions of earth space. z Demography: Is the statistical study of human population, in its concern with spatial analysis, the relationship of numbers to areas. Chapter 6 Population Growth z z z z Over 6.4 billion people About 77 million increase per year since 1990 China & India account for 38% of the world’s population U.S. to hit 300 million tomorrow @ 7:46 AM Population Definitions z z z z z z Rate Cohort Crude Birth Rate (CBR) Total Fertility Rate (TFR) Crude Death Rate (mortality rate) (CDR) Infant Mortality Rate 16 Population Pyramids z z z z Rapid growth Stability Decline Disrupted growth Demographic Transition Model z Western Experience z z z z z Stage 1: High births, high deaths Stage 2: High births, declining deaths Stage 3: Declining births, low deaths Stage 4: Low births, low deaths (Stage 5: Deaths higher than births) Growth z z A Divided World Converging z z z Demographic Equation z z Regional population change is a function of natural change (difference between births & deaths) and net migration (differences between in-migration and out-migration). Births – Deaths + Immigration – Emigration = Population Growth. When this equals out, it is known as zero population growth. Rate of natural increase Doubling times The population history of Europe is not necessarily predictive of what will happen in the developing world Western technologies, medicines, & public health lower death rates quicker today than in the past Still some areas with very high fertility rates World Population Distribution z z z z 90% of all people live north of the equator, 2/3 in midlatitudes A large majority occupies a small part of the land surface People congregate in lowland areas More people live on the continental margins, near oceans 17 Population Concentrations z East Asia Cluster z z z z z The relationship between number of inhabitants and the area they occupy Crude density z Physiological density z Agricultural density z China, Japan, South Korea, Taiwan South Asia Cluster z Population Density India, Bangladesh, Pakistan Europe Northeastern United States / SW Canada z z z Overpopulation z z A value judgment reflecting an observation or a conviction that an environment or territory is unable adequately to support its population. Overpopulation is a reflection of carrying capacity z z z z z z z Can be equated with conditions of life Accurate & precise data is often difficult to obtain, but census quality is slowly improving worldwide Projections are based on assumptions and are not forecasts # of people per unit of arable land Excludes city population from the physiological density calculation Urbanization The # of people an area can support on a sustained basis given the prevailing technology Population Data & Projections # of people per unit of land Cities have grown rapidly in the past 50 years Urban growth raises issues of housing, sanitation, employment, transportation, etc. Some of the developing world cities, often surrounded by concentrations of people living in uncontrolled settlements, slums, and shantytowns, are among the most densely populated areas in the world. Population Controls z Malthus / Neo-Malthusians z z z Population will outstrip food Population growth must be controlled Fertility can be difficult to control z z z Cultural preferences for large families Rejection of Western plans Belief that technology will provide more food 18 Components of Culture Cultural Geography Chapter 7 z Culture is learned, not biological z Culture traits Culture complexes Culture regions Culture realm z z z z Interaction of People & Environment z z z Environmental Determinism Possibilism Cultural landscapes z Subsystems of Culture z The Technological Subsystem z The Sociological Subsystems z The Ideological Subsystems z z The earth’s surface as modified by human action z Culture Change z z Innovation Spatial Diffusion z z Syncretism z Amalgamation theory Assimilation Artifacts Sociofacts Mentifacts Language z Language families z Language spread & change z Acculturation z A complexly interlocked web of behaviors z z Indo-European, etc. Word meaning, pronunciation, vocabulary, & syntax Standard & variant languages z Dialects 19 Language & Culture z z z Gender differences Language as a unifying force Bilingualism / Multilingualism Classification of Religions z Universalizing z z z z Strong territorial & cultural ties Judaism, Hinduism, Shinto Tribal or Traditional z z z z z z Dominant in some societies, less so in others Affects social roles, economics, politics, etc. Judaism z Monotheistic Ethnic religion Origins in Southwest Asia about 3,000-3,500 years ago Dispersion after 1st century AD (CE) z Synagogues are centers of worship z z z z Known as the Diaspora Small, ethnic religions Christianity z z Ethnic z z Seek to transmit beliefs to others Buddhism, Christianity, Islam Religion Origins in Southwest Asia 2,000 years ago Grounded in Jewish religious beliefs Universalizing; grew rapidly Split by dissolution of the Roman Empire Reformation in the 15th & 16th centuries Islam z z Judeo-Christian roots Mohammed lived in the early 7th century in modernday Saudi Arabia z Islamic calendar begins in 622 AD with the flight to Medina (Hegira) z Five Pillars Koran z Succession disputes led to Sunni / Shi’ite split z Worship centered on the mosque z z z Should be read in Arabic Sunnis account for 80-85% of Muslims 20 Hinduism z z Possibly 5,000 years old 1 billion adherents z z z z z z z 80% of Indians Spread into Southeast Asia No single creed or doctrine Caste system Dharma A lot of rites, ceremonies, festivals, and gatherings Temples & shrines are important Ethnicity z Refers to the ancestry of people who share some common characteristic z z Language, religion, race, national origin, customs Territorial segregation Buddhism z z z z z Began in the 6th century BC in what is now northern India Siddhartha Gautama was the Buddha, “Enlightened One” Four noble truths Universalizing Spread to Sri Lanka, Southeast Asia, China, Korea, & Japan Gender & Culture z Gender is a social term, not biological z Traditional roles changed by industrial revolution & modern society z Greatly affected by culture Culture Realms z Regionally discrete areas that are more alike internally than they are like other realms Spatial Interaction Chapter 8 21 Distance & Spatial Interaction z Spatial Interaction Barriers to Interaction z Distance Cost Physical environment Culture z Psychological z z z z Distance decay Critical distance Individual Activity Space z z z z z z Territoriality Activity space Mental Maps Stage in Life Mobility Opportunities Spatial Interaction & Technology z z Automobiles z Diffusion & Innovation z Contagious diffusion z Hierarchical diffusion Migration z z z Religion, language, gender, political systems A relocation of both residential environment and activity space The decision to migrate z Telecommunications z z z Push factors Pull factors Place utility Migration issues z Anti-immigration laws 22 Barriers to Migration z z z z z Physical barriers Economic barriers Cost factors Cultural factors Political barriers Patterns of Migration z z z z Migration fields Channelized patterns Return migration Hierarchical migration Globalization z z The increasing interconnection of all parts of the world Economic Integration z z z z International banking Transnational corporations (TNCs) Global marketing Chapter 9 Political Integration z z z z Political Geography Supranationalism Nongovernmental organizations News media & Internet Cultural Integration States, Nations, & NationStates Geographic Characteristics of States Political Geography z Size z z z z State Nation Nation-State z z z Binational or multinational state Part-nation state z Ministates Shape z z z z z Compact Elongated Prorupt Fragmented Perforated z z Location Cores & Capitals z z z z z Core areas Primate cities Unitary states Federal states Forward-thrust capitals Stateless nation 23 Boundaries z z z z z z Natural (physical) boundaries Artificial (geometric) boundaries Antecedent boundary Subsequent boundary Consequent boundary Superimposed boundary Centripetal Forces z z z z Nationalism Unifying Institutions Organization & Administration Transportation & Communication Boundaries as Sources of Conflict z z z z Centrifugal Forces z z z Supranationalism z z Territorial Seas Exclusive Economic Zones (EEZ) High Seas Economic Alliances z z Law of the Sea Subnationalism Regionalism Devolution Regional Alliances United Nations (UN) z Organized religion Nationalism z z z Cooperation Among States Landlocked states Waterbodies Minority-group identification Resource disputes z z European Union (EU) NAFTA ASEAN Military & Political Alliances z z z z NATO Warsaw Pact Commonwealth of Nations Organization of American States (OAS) 24 The Geography of Representation z Electoral geography Redistricting z Gerrymandering z z z Voting rights & race Primary activities z Secondary activities z Tertiary activities z Manufacturing Quaternary activities z Quinary activities z Processing & dissemination of information Subsistence economies z Commercial economies z Planned economies High-level decision-making jobs Agriculture z z Services z z Types of Economic Systems Hunting, gathering, grazing, agriculture, fishing, forestry, mining z z Chapter 10 Stacked, excess vote, & wasted vote methods Classification of Economic Activities z Economic Geography The growing of crops & the tending of livestock Subsistence Agriculture z Extensive Subsistence Agriculture z Nomadic herding z Shifting cultivation z z z Transhumance Swidden or shifting cultivation Intensive Subsistence Agriculture z z z Rice farming Urban farming Green Revolution gains 25 Commercial Agriculture z z z z z Production Controls Von Thünen Model z Land near markets is used intensively for high-value crops & is divided into small units z Land far from markets is used extensively Intensive Commercial Agriculture (Large Investment – Near Market) z Dairy & truck farms z Livestock-grain farming Extensive Commercial Agriculture (Far from Market – Cheap Land) z Large-scale wheat farming z Livestock ranching Special Crops (Climate – Not distance to market) z Mediterranean z Plantations Manufacturing z Industrial Location Models z z Least Cost Theory z Alfred Weber z Agglomeration z z z z Many of the world’s largest economies are corporations 75 million employees z 10% of worldwide, nonagrarian employment Fordist vs. flexible manufacturing z Transport Characteristics Agglomeration Economies z Comparative Advantage z Fishing & Forestry Mining & Quarrying Transnational Corporations (TNCs) Other Considerations z z Other Primary Activities External economies Geography & Public Policy Contests and Bribery z Do you think it is appropriate to spend public money to attract new employment to your state or community? Why or why not? z If yes, what kinds of inducements and what total amount offered per job seems appropriate to you? World Manufacturing Patterns & Trends z Small number of areas dominate z z z z Eastern Anglo America Western & Central Europe Eastern Europe Eastern Asia 26 High Tech Patterns z z Tertiary & Beyond Major factor in employment growth & an increasing share of industrial output Regionally concentrated z z Silicon Valley Location tendencies z z z Proximity to universities Avoidance of areas with strong unions Locally available venture capital Areas with favorable quality of life Good communication & transportation infrastructure z Over 80% of all workers in U.S. Distribution of services must match effective demand Tourism an important sector Quaternary & Quinary increasingly important Services in World Trade z Nearly ¼ of all world trade z z z Developing countries can benefit Foreign Direct Investment The Functions of Urban Areas z z z z z z z z Urban Geography Financial, brokerage, & leasing services Retailing Wholesaling Manufacturing Business Services Entertainment Political & Official Administration Military Defense Needs Social & Religious Service z z z z z z z Public Services Education Transportation & Communications Meeting Places Recreation Visitor Services Residential Areas Chapter 11 The Location of Urban Settlements z Site z Break-in-bulk locations z z River crossings, head-of-navigation locations, railheads Situation 27 The Economic Base z Basic sector z z z z z Rank-Size Rule Primate cities World cities Urban influence zones Towns in Agricultural Areas z Network cities z z Support the urban area, but do not bring in outside money z z Multiplier effect Central Place Theory z The Urban Hierarchy z Basic/nonbasic ratio z z z Workers engaged in “export” activities Nonbasic sector z z Systems of Urban Settlements Walter Christaller (1933) A model for helping to explain town interdependence Threshold & range A hierarchy exists of numerous small towns offering basic goods and services and fewer large towns offering a wider range of goods Models of Urban Land Structure z Concentric Zone Model z Sector Model Inside the City z z Competitive bidding for land determines much of the land use within the city In general, population density & land values decrease as distance from the CBD increases z z Multiple-Nuclei Model Peak-value intersections Population densities tend to show a hollow center Social Areas of Cities z City residents, especially in larger, more complex cities, will often segregate themselves based on: z z Central Place Theory z z Social status Family status Ethnicity 28 Institutional Controls z Local & national governments pass laws to control urban life z z z z z Zoning and other non-market controls Ambler V’s Euclid 1926 Euclidian Zoning – Segregated use Exclusionary Zoning Zoning Out Kids Suburbanization in the U.S. z z z z Metropolitanization & suburbanization after WWII Housing developments served as a pull factor to the suburbs Industries followed the trend Suburbs began to rival the power of the central city z Central City Change z Constricted central cities z z z Suburbanization reduced the economic base of the central city and isolated its residents Immigration & gentrification have revived many urban areas Expanding central cities z Cities have expanded automobile linkages to keep the suburbs within the sphere of the central city Edge Cities World Urban Diversity z z z z U.S. & Canadian cities West European cities East European cities Cities in the Developing World z z z Latin America Asia Africa 29
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