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1. What is Geography? - Greek Definition Geo = “Earth”; graphy = “to write” Geography = to write about the 2. Purpose of Early First geographers had practical Geography purposes. They explored uncharted territories, mostly for trade. First geographers included Chinese, Greeks, North Africans. They were also first cartographers making detailed maps & making measurement 3. Eratosthenes Head librarian at Alexandria during third century, BC One of world’s first cartographers Computed Earth’s circumference based on sun’s angle at Summer Solstice and the distance between 2 Egyptian cities: Alexandria & Syene. Only about 109 miles too long! Coined the term geography 4. Ptolemy Wrote an 8-volume Guide to Geography--included rough maps of landmasses as he understood them and a global grid system Contributed to both geography and the technical aspects of cartography 5. Exploration 1400 AD, knowledge of the globe expands rapidly as explorers travel the EArth mapping landforms, climates, indigenous cultures, and the distribution of plants and animals Influential early explorers = Bartholomeu Dias, Christopher Columbus, Ferdinand Magellan Later explorers include Alexander Humboldt & members of the Lewis & 6. George Perkins 1864 - WroteMarsh Man and Nature, or Physical Geography as Modified by Human Action Traveled a lot through Europe and Middle East Warned that people’s willful destruction of the environment could have disastrous results--he had seen the desertification of the Fertile Early modern 7. Carlgeographer Sauer (1925), said cultural landscapes (result of human interaction with environment) should be the focus of geographic inquiry Even landscapes that look natural have had some alterations as a result of human 8. The Quantitative A movement in 1950s and 60s where Revolution social scientists stress using empirical measurements, hypothesis testing, computer programs to explain geographic patterns. Social sciences are influenced by modernist philosophy and tech innovation. Credited for bringing geography into mainstream science; criticized for limiting questions geographers ask and 9. Remote Sensing Process of capturing images from Earth’s surface from air using satellites or airplanes Can be digital or analog photos; data can be collected from several bands of electromagnetic spectrum (e.g. infrared to collect vegetation data) Gives access to landscapes previously out of reach (e.g. Amazon Rainforest) Helps measure change in land use 10. Global Positioning System (GPS) A group of satellites that orbit the Earth, broadcasting location information to handheld receivers on Earth’s surface With a receiver, you can get highly accurate info about geographic location in terms of latitude and longitude, from any point on Earth 11. Geographical Information System A family of software programs that allow (GIS) geographers to map, analyze, and model spatial data Most use thematic layers, made up of individual maps that contain specific features like roads, stream networks, or elevation contours Multiple layers can be combined in to one map using features to help geographers understand and analyze spatial relationships between different 12. Divisions of Geography Geography is typically divided into three areas (each is further divided). Human geography, physical geography, and Earth system science (blending the first two). Earth system science is often called human environment relationships (HER), or 13. Human Geography Broadly defined as the study of human activiites on the Earth’s surface. Human geographers generally focus their work in more specific subdisciplines including population geography, cultural geography, urban geography, agricultural geography, and political geography. Often, human geographers combine two or more subfields in their research, hoping to better understand the spatial dimensions of complex, interlinked social systems. 15. Physical Geography Physical geographers study spatial characteristics of the Earth’s physical and biological systems Many natural scientists, including meteorologists, climatologists, ecologists, oceanographers, geologists, soil scientists, and hydrologists, study physical geography. Through understanding of the spatial variability of the phenomena under investigation each of these types of scientists gain insight into why certain phenomena behave the way they do in 16. Earth System Fairly newScience area of focus for the sciences, became popular in the last few decades. Arose as a way to study interactions between physical systems on a global scale. Geographers have been at the forefront of this emerging 17. Systematic Geography Study of the Earth’s integrated systems as a whole, instead of focusing on particular processes in a single place. Allows geographers to apply their knowledge of a specific spatial process broadly beyond unique places to other areas 18. Environmental Results fromGeography intersection of human and physical geography. Environmental geographers come from almost every academic discipline; frequently occupy prominent positions at the forefront of debates regarding anthropogenic, or human-induced, environmental change; conservation planning; and sustainability. Concerned with anything from history of a given landscape to the effects of pollution on impoverished neighborhoods, to the creation of nature reserves for endangered species. 19. W.D. Pattison’s Four Traditions of Pattison = University of Chicago geographer who Geography published a defining piece on geography’s 4 defining traditions (1964) Earth-science tradition = essentially physical geography culture-environment tradition = HER or environmental geography locational tradition = analysis of spatial data through cartography area-analysis tradition = regional geography, an investigation and description of unique pieces of Earth’s surface 20. Five Themes of Location - position on Earth’s surface Geography (absolute/relative) Place: Physical and Human Characteristics - a specific point distinguished by a particular character Human/Environmental Interactions: Shaping the Landscape - the relationship between culture and landscape Movement: Humans Interacting on Earth interconnections Regions: How They Form and Change -a space 22. The Spatial Intellectual framework thatPerspective lets geographers look at Earth in terms of relationships between places. Geographers look at the spatial distribution of different phenomena and as how certain phenomena come to occur in certain places. Geographers ask: How do 2 places interact economically, socially, and culturally? Why do some places have more in common than others? How are social phenomena conveyed over 23. The Importance of Scale Geographic scale refers to a conceptual hierarchy of spaces, from small to large, reflecting actual levels of organization in the real world. Ex: neighborhood to urban area to metropolitan area to region. Geographers wonder how processes at one scale may affect activities at other scales. Geographers understand that patterns or analysis at large scales may not reflect apparent spatial differences at smaller 24. The Region as a region = basic unit of analysis in Concept human geography allows geographers to group pieces of Earth’s surface are according to similarities do not exist as well-defined units--conceptual constructions used for convenience and 25. Regional Def: the study of regions Geography Regions vary in size; a region may be an entire continent, for example, North America, or a smaller area, such as southern Florida. Regional geographers, no matter the size of the region under study, investigate the unique characteristics, patterns, and processes existent within Human geographers work with various types of 26.data Qualitative vs.main Quantitative Data that come in two forms: qualitative and quantitative. Qualitative - associated with cultural or regional geography because they are more unique to and descriptive of places and processes. Qualitative - not suited to statistical analyses and modeling and are often collected through interviews, empirical observations, or the interpretation of texts, artwork, old maps, and other archives. Quantitative - uses rigorous mathematical techniques, are particularly important in 27. Idiographic vs. Idiographic -Nomothetic facts or features unique to a particular place or region, such as its history or ethnic composition. Nomothetic - concepts that are universally applicable. Contrast is similar to the regional/systematic difference; regional geographers tend to be more idiographic, while systematic geography takes a nomothetic approach by seeking universal laws that can be applied broadly to numerous places on the Earth’s surface. 28. The Geoid The term for the bumpy oblate spheroid that is the Earth’s surface. An oblate spheriod is a sphere that is slightly bigger horizontally than vertically. Approximately 8,000 miles in diameter and its circumference is about 25,000 miles. 29. Projection The scientific method of transferring locations on Earth’s surface to a flat map. Traditionally, done by placing light inside a translucent globe and projecting globe’s features on a piece of paper surrounding the globe. Now, done with numerous, different, 30. Map Distortion All flat maps are distorted as a result of going from 3D to 2D; the only accurate representation of Earth’s surface is a globe. Some projections distort certain features to preserve others. Generally, major features that get distorted or preserved are shape, area, & direction. 31.Cartographers When Projection Matters choose projections according to the purpose of the map. Ex: a map of population density by country should use a projection that preserves area (e.g. an equal-area map) Global-scale maps are much more distorted than maps of local places (e.g. state shapes & sizes do not change nearly as much as country 32. The Mercator Projection advantages: very little distortion of shape; consistent direction; rectangular map greatest disadvantage: area is grossly distorted toward the poles, making high-latitude places look much larger than they are cylindrical projection - projected onto a cylindar Mercator Projection 33. The Peters Projection Cylindrical projection that retains accurate sizes of all the world’s landmasses Reveals how large the landmasses near the equator actually are Often seen as a political statement - an attempt to focus attention on the world’s poorest countries The Peters Projection Map 34. The Fuller Projection Maintains the accurate size and shape of landmasses but completely rearranges direction Cardinal directions -- north, south, east, and west--no longer have any meaning 34. The Fuller Projection 35. The Robinson Example of an attempt to balance Projection projection errors Does not maintain accurate area, shape, distance, or direction, but minimizes errors in each Is aesthetically pleasing, so is frequently used by cartographers at organizations like the National Geographic Society (where it was 35. The Robinson Projection 36. Azimuthal Projections Planar projections - formed when a flat piece of paper is put over a globe with a light source inside One of the poles is at center of the map, giving an impression of looking up or down at the Earth 36. Azimuthal Projections 37. Cartographic Scale aka map scale = ratio between distance on a map and actual distance on Earth’s system Ratio is constant despite units; ex: 1:200 means 1 unit on the map is equivalent to 200 of that same unit in reality. On small scale maps, ratio between map units and ground units is small and map represents a larger piece of the Earth’s surface On large scale maps, ratio between map units and ground units is large, meaning map represents a relatively small piece of the Earth’s surface. 38. Resolution refers to map’s smallest discernible unit; basically it is the smallest thing visible on a map. If an object has to be 330 feet long in order to show up on a map, then that map’s resolution is 330 feet. 39. Generalization Averaging over details; in a cartographic context generalization results from scaling changes. Small-scale maps have high generalization, or less detail, but show larger pieces of the Earth’s surface area. Large-scale maps have less generalization, or more detail, but show smaller pieces of the Earth’s surface. A map of the entire United States (small scale) will not show the small towns and villages that would appear on a map of a local area (large Form depends on vs. the map’s purposeMaps 40. Reference Thematic Reference maps are used to navigate between places and include topographic maps, atlases, road maps, and other navigational maps. Thematic maps display one or more variables across a specific space such as population variables, voting patterns, or economic welfare. Many ways to display thematic data; some common methods include choropleth maps, proportional symbol maps, isoline maps, 41. Isoline Maps Maps that use lines to represent quantities of equal value. Most common example is a topographic map, where each line represents a constant elevation. Lines spaced close together indicate a rapidly changing value, whereas lines far apart indicate little change over space. Isolines can be used to show other values that vary continuously over space such as temperatures (e.g., in physical geography) 43. Proportional Symbols Maps Size of the chosen symbol (e.g., circle, triangle, or flow line) indicates relative magnitude of some value for a given geographic region. Flow lines often used to show movement of goods or people over space; lines get relatively thinner and thicker as values shrink or expand. Proportional Symbols Map: Bigger dots show more users. 44. Dot Density Maps use points to represent particular values; for example, cropland harvested where each dot represents 1,000 bushels of corn. value comes from the ability to facilitate perception of spatial pattern; in example of corn cropland harvested, an obvious spatial pattern would emerge in the Midwest. The disadvantage is that data that does not meet the threshold (e.g., only 999 bushels of corn harvested in a particular 45. Choropleth Maps Use colors or tonal shadings to represent categories of data for given geographic areas; countries, states, or counties most commonly use polygons. A map of population density by county in the United States might use five different colors to classify density values. 46. Cartograms Transform space so that the political unit (state or country) with the greatest value for some type of data is represented by the largest relative area and all other polygons are represented proportionally to that largest polygon. Shows comparative patterns. Ex: a US electoral vote cartogram would make Wyoming small (few electoral votes) and make smaller states bigger to show the influence on the political process. 47. Visualizations Exist digitally and use sophisticated software to create dynamic computer maps, some of which are threedimensional or interactive. Some allow geographers to investigate features that cannot be seen with the naked eye; others use models to show how landscapes change over time In some, people can walk through, or fly over, landscapes. 48. Simplification refers to level of detail portrayed on a map. if a cartographer designs a map of the entire United States, he or she would probably not include minute details such as locations of towns smaller than fifty thousand people. completely depends on the purpose of the map and the size of the area the map is portraying. 49. Aggregation refers to the size of the unit under investigation such as cities, counties, states, or countries. like simplification, completely depends on the purpose of the map. level also depends on the data geographers have access to. If a geographer investigates population density with data at the state level, his or her map will dramatically differ from a geographer that has density data at the county level 51. Power of Maps Ability to make something nonspatial (e.g., population rates), spatial, thereby facilitating the perception of spatial relationships. Ability to simply display a large amount of information, for example, the only way to see the entire Earth’s surface at once. Can highlight only necessary information: for example, maps of subway systems contain only necessary information for using the subway; everything extra is removed. 52. Deception of Maps deceive by simplification and generalization by excluding or generalizing important details. On many maps, certain features are exaggerated for clarity; for example, reference maps display highways as much thicker than they would appear in reality. Symbolism can mislead: people associate certain colors with certain features (greens and browns with plants); if colors are not used correctly, maps may be misread Projection means no map can give an accurate picture ofsize, shape, and direction of land 53. Cognitive Maps dynamic internal representation of place or environment when someone is asked to draw it, it becomes a “sketch map” Sketch map is external representation of the spatial information that exists in a person’s head Each cognitive map is individual, dependent on info an individual finds important; its limited by amount and type of experience the person has with a place a child’s cognitive map will differ from an older brother’s map--older brother likely has a bike and 56. Absolute Location v. Relative Location Absolute location is the exact location of any object or place on Earth’s surface as determined by a standard grid or coordinate system-usually latitude and longitude. Relative location describes a place’s location in terms of its relationship to places around it--how you would locate it. #57. Latitude and Longitude Coordinates used for locational purposes are made up of lines of latitude and longitude Lines of longitude (meridians) begin at the prime meridian (passes through Greenwich, England) and ends at the International Date Line. All meridians meet at the poles. Lines of latitude (parallels) run parallel to each other. They begin at the equator Site 59. = the Site physical and cultural features v. Situation of a place, independent to other places around it Situation describes a place’s relationship to other places around it EX: New Orlean’s site is poor--it is basically a bowl below sea level, meaning heavy rain is a big problem. However, its location on the Mississippi River delta makes its situation in relation to the rest of the United States very 60.absolute Absolute vs. Relative Distance distance = exact measure of the separation between two points using a standard measure relative distance = when less precise but often meaningful measures are used to describe separation between two points most common relative distance measure is time Ex: New York is typically described as being five hours from Los Angeles (by 61. Feature Distribution Concepts: Density, Dispersion (Concentration), Helps discover/analyze Pattern spatial processes Density - frequency of a feature in a given area. (Not the same as dense; dense = cluster) Dispersion- how features are spread out from one another Concentration - how features are 62. Spatial Association describes the distribution of two or more features and how they do or do not correspond allows geographers to understand why spatial patterns exist EX: Mapping of Type 2 Diabetes and socioeconomic status (SES) shows a STRONG spatial association because the highest levels of Type 2 Diabetes were also the lowest levels of SES 63. Distance Decay the pattern of decreasing likelihood of interaction with a place as the distance increases most shoppers in a grocery store live nearby different activities have different distance decay curves 64. Distance Decay Curve This is taped onto your card! 65. First Law of Geography Everything is related to everything else, but near things are more closely related than far things. Describes “the friction of distance,” meaning that the farther away something is, the less likely someone is to interact with it. 66. The Gravity Model first described in the 1850s, it is based on Isaac Newton’s law of universal gravitation lij = PiPj/Dij2 Where lij = interaction between places i and j Pi = the population of place i Pj = the population of place j Dij2 = the distance between places i and j, squared Important implication = large cities may still have extensive interactions despite being separated by great distances; for example, New York and 67. Connectivity a measure of all the means of connection and communication between places. virtually synonymous with relative distance as some places are highly connected to one another yet separated by significant distances. 68. Accessibility relative ease with which you can reach a destination determined by a place’s connectivity; the more means there are for interacting with a place, the higher its accessibility 69. Network The areal pattern of connections between places. Some describe literal connections between places such as the connections between subway stops on a metro map. However, some are less literal; for example, many emerging Internet sites such as “mySpace” or “Facebook” are social networks, describing all the links between a group 70. Time-Space Convergence Idea that with increasing transportation and communications technology, absolute distance between certain places is, in effect, shrinking. Ex: increased transportation tech has “shrunk” the distance between New York City and London; it used to take days or weeks (by boat); now it takes only half a day by plane. Increased communications tech allows places to communicate instantaneously with each other, which, in effect, completely negates distance’s effect on interaction (via voice or text communication) 71. Spatial Diffusion The ways phenomena (tech innovations, cultural trends, outbreaks of disease) travel over space Two types Relocation diffusion - physical movement of people leads to spread (usually migration); few “adopters” Expansion diffusion - interaction leads to spread; rapid growth of “adopters” before stabilizing 72. Contagious Expansion Diffusion Describes diffusion resulting from direct contact with an individual. Ex: infectious diseases like AIDS are spread by 73. Heirarchical Expansion Diffusion Describes spread first to major nodes and then down a hierarchy. Fashion trends spread hierarchically by first appearing in major fashion nodes (London, Milan, Paris) and then spread from there. Within major nodes, a phenomenon typically spreads by contagious diffusion--a fashion trend will spread within Milan. 74. Stimulus Expansion DescribesDiffusion the pattern by which a concept is diffused but not in the same form as in original contact. Example: some Native American groups developed their own written language based on exposure to written 75. Barriers to Something that stops the spread of Diffusion phenomena across space. Can be physical barrier = in the environment like mountains, highways, rivers, etc. Can be sociocultural barrier = a person’s beliefs, culture, or place in society prohibit interaction with certain people or places Psychological barriers = usually fear or ignorance; emotions keep people from interaction with people or places and keep 76. Time-Distance Decay The idea that the longer it takes for something to spread or move over space, the less likelihood of interaction with or spread of that phenomena. Essentially description of time as a barrier to spatial diffusion. 77. Regions def: pieces of Earth’s surface area four types--see cards 78, 79, 80, 81 78. Administrative politically determinedRegions so boundaries are exact hierarchical--Country made up of states; states made up of counties, counties made up of . . . have uniform membership-everyone in OC is equally a AKA - defined 79.“thematic” Formalregions Regions by one or more variables or themes membership strength varies-some members represent the theme more strongly (wheat belt example) boundaries are vague EX: climate regions, language, 80. Functional Regions boundaries surround a “hub” or “node” that people interact with--the space used by the interaction defines the boundary EX: commuters to a city, newspaper circulation area, TV station reception area 81. Cognitive/Perceptual/Vernacular describe how people Regions informally organize places in their mind formed by individuals, but often shared by others. EX: most people would draw similar boundaries around “Deep South” vague, variable, imprecise 82. Zelinsky’s Work on Perceptual Regions 1970s - Zelinsky divided the US into what he called vernacular regions based on what he thought were unique cultural characteristics of each area