Exhaustive University Study Guide: Human Geography and Global Systems
Thinking Geographically and Spatial Concepts
Absolute direction is defined as the exact direction in which one is heading, while relative direction involves using the current situation to determine the direction. In a similar vein, absolute distance refers to the exact distance between two specific places, which is usually measured formally in miles or kilometers. Conversely, relative distance is an approximate measurement between two locations, often expressed in terms of time. Absolute location denotes the exact spot where something is found, such as the specific GPS coordinates of a place. Relative location, however, relies on geographic features to describe where a place is situated in relation to others. To collect information about the Earth's surface, geographers utilize remote sensing, which involves gathering data from satellites and sending it to a Geographic Information System (GIS). A GIS is a computer system designed to collect, analyze, and display geographic data. This works alongside the Global Positioning System (GPS), which provides precise location data.
Data used in geography is categorized as either qualitative or quantitative. Qualitative data consists of individuals' thoughts and is generally up for debate, while quantitative data consists of information that can be counted and presented in numerical form, making it objective. A primary source of quantitative data is the census, which is an official count of all individuals in the population conducted every years. It tracks information such as gender, age, ethnicity, and the total number of people. Geographers also consider cartography, which is the study and art of making maps, and conduct case studies, which are detailed studies of specific groups, events, organizations, or phenomena. Geography is examined at various scales, including local, national, regional, and global levels. The scale of analysis refers to how geographers use these different scales to examine phenomena and draw meaningful conclusions.
Spatial concepts further define how things are arranged on Earth. Distance decay suggests that people are more likely to interact with other people, places, or things that are closer to them rather than those farther away. Time-space compression describes how the time it takes for something or someone to move from one space to another is decreasing due to technology. Clustering occurs when things are grouped together in specific areas rather than being dispersed, while concentration refers to the spatial arrangement or spread over a given area. Spatial distribution describes how different objects in an area are arranged, connected, or isolated. This refers to the overall pattern, spread, or arrangement of features.
Site and situation are fundamental descriptors of location. Site refers to the physical characteristics of a place, while situation refers to the location of a place relative to what surrounds it and the things that connect places together. Spatial interaction involves the movement and flow of goods, ideas, information, and people across different areas. Historically, geographers debated the relationship between humans and the environment. Environmental determinism argues that the physical environment sets restrictions that prevent a society from advancing. Environmental possibilism counters this, suggesting that while the environment puts limits on society, people can modify the physical environment to overcome those limits. Sustainability is the practice of using Earth’s resources in a way that ensures they will be left for future generations.
Regions are geographic areas with common characteristics or patterns of activity. A formal region is an area with common attributes defined by social, economic, political, or environmental characteristics; these regions have set boundaries, though they are not always visible. A functional region is organized around a node or center point, such as economic activity, transportation, or communication hubs. A perceptual or vernacular region does not have a set boundary or formal definition but exists based on an individual's beliefs and feelings about that area. The process by which elements, ideas, or innovations spread over time is called diffusion. The original place where an idea or culture begins is called the hearth. Diffusion can be relocation-based, occurring through the migration of people, or expansion-based. Expansion diffusion includes contagious diffusion (spread through interactions like a trend), hierarchical diffusion (spread from a person of authority to other places), and stimulus diffusion (where an idea spreads but is modified by new adopters).
Population and Migration
Population geography utilizes different measures of density to understand human distribution. Arithmetic density is the number of people divided by the total amount of land, where a high number indicates many people living near each other. Agricultural density is the number of farmers divided by the amount of land suitable for agriculture; a higher number suggests more manual labor and less technology. Physiological density is the number of people divided by the total amount of arable land, and high numbers here risk depleting the land's resources. The ecumene refers to the portion of the Earth's surface that is permanently occupied by human settlement. Factors affecting population include the carrying capacity, which is the amount of people the environment can support without being damaged, and urban sprawl, which is the spread of urban development into nearby developing areas.
Demographic trends are visualized through a population pyramid, a bar graph showing population distribution by age and gender. The dependency ratio is the number of children aged and adults aged or over relative to the working active labor force. Doubling time is the amount of time required for a population to double in size. Fertility rate measures the average number of children a woman will have, while the mortality rate (specifically infant mortality) is the total number of deaths under the age of for every babies. Governments may implement pronatalist policies to increase birth rates or antinatalist policies to decrease birth rates, often involving contraception (birth control).
The Demographic Transition Model (DTM) contains five stages: Stage 1 features high Crude Birth Rates (CBR) and high Crude Death Rates (CDR) that cancel each other out; Stage 2 sees a lowering CDR while the CBR remains high; Stage 3 has a high CBR and a low CDR; Stage 4 reaches a point where CDR and CBR are roughly equal; and Stage 5 features a CBR that is lower than the CDR. The Epidemiological Transition Model (ETM) identifies reasons for death in these stages: Stage 1 involves diseases, food shortages, and endemics; Stage 2 sees fewer deaths due to improved food production, sanitation, and living standards; Stage 3 features longer life with deaths coming from aging-related diseases; Stage 4 sees medical advancements delaying diseases, though sedentary lifestyles lead to obesity; and Stage 5 is marked by infectious diseases resistant to antibiotics and dense populations. Thomas Malthus, in his Malthusian theory, argued that population growth would eventually exceed carrying capacity, resulting in war, famine, disease, and social destruction, thus necessitating government restrictions on having children.
Migration follows specific patterns, such as Ravenstein's Laws of Migration, which state that most migration is for economic reasons, migrants typically travel short distances via step migration (stopping along the way), and migrants are more likely to move from rural to urban areas. Migration creates a counterstream back to the original location and helps large urban areas grow while increasing economic development. Push factors are negative conditions that make people leave a location, while pull factors are positive conditions that attract them to a new one. Migration can be voluntary or forced by political or economic factors. Individuals forced to flee due to conflict but who remain in their country are Internally Displaced Persons (IDPs), while those who cross international borders to escape war or persecution are refugees. Asylum seekers are those whose request for protection is pending in a country. Additional migration types include transnational migration (moving to a country with similar cultural values), chain migration (a legal migrant sponsoring a family member), internal migration (moving within a country), and transhumance (seasonal movement of livestock).
Culture, Language, and Religion
Culture is expressed through the cultural landscape, which reflects how cultural, economic, and physical elements define an area. This results in sequent occupancy, the idea that successive cultures leave their mark on a geographic location over time. Placemaking is the process by which a community transforms a public space for activities. When cultures interact, they may undergo acculturation (adopting and modifying traits from another culture) or total assimilation (fully taking on a new culture and losing the original one). Multiculturalism describes many cultural groups within one society. Ethnocentrism involves viewing another culture by the standards of one's own, while cultural relativism involves viewing another culture through an open perspective without judgment. Architectural styles also reflect culture: traditional architecture uses local resources; modern architecture focuses on functionality; and post-modern architecture strives for a unique look incorporating local culture. Forces in society can be centripetal (uniting people) or centrifugal (dividing people).
Language and religion are key cultural components. A language family is a group of languages with common ancestry, and dialects are variations of a language characterized by vocabulary, spelling, and meaning. A lingua franca is a common language used by people whose native languages are different. Creolization occurs when two languages combine to form a third, often due to colonization. Cultural convergence happens when cultures form one mass culture, while cultural divergence occurs when individuals become separated from parts of their culture. Syncretism involves multiple cultures evolving over time to create something new, such as a religion. Religions are either universalizing, which aim to expand to as many people as possible, or ethnic, which do not try to convert others and are often tied to one location. Ethnic neighborhoods help maintain cultural practices, while indigenous communities represent the original inhabitants of an area. These patterns are often shaped by historical processes like imperialism (extending power via military or other means) and colonialism (direct control over an area).
Political Geography
Political entities are defined by sovereignty, which is the authority of a state to govern itself. A state is an area with a shared culture and history that is recognized by others, while a nation is a group of people with a shared culture and homeland. A nation-state is a sovereign state whose population shares a language and culture. A stateless nation is a group with self-determination but no recognized state, while a multinational state contains more than one nation. A multistate nation exists when a nation has its own state but also resides in others. Areas may be semi-autonomous (moderate self-governance) or autonomous (high degree of self-governance). Devolution is the transfer of power from a national government to local governments, which can lead to balkanization—the breaking up of a state into different, often conflicting, units. A shatterbelt is an area caught between stronger external powers currently fighting.
Boundaries define political limits. Antecedent boundaries existed before human settlement (e.g., the Andes mountains between Argentina and Chile). Subsequent boundaries develop along with cultural landscapes. Superimposed boundaries are forced upon people by external powers. Relic boundaries are no longer active but still visible. Geometric boundaries follow straight lines (e.g., on a map). Consequent boundaries are created to divide ethnic or religious groups, such as the border between India and Pakistan. Demarcated boundaries are marked by physical items like signs or walls. Under the United Nations Convention on the Law of the Sea (UNCLOS), maritime boundaries are established; international waters begin miles from land. Internally, voting districts are redrawn through redistricting to ensure fair votes, but this can be manipulated through gerrymandering to favor one party. Governments can be unitary (power in a central authority) or federal (power distributed globally and locally).
Agriculture and Rural Land Use
Agriculture has evolved through three revolutions. The first revolution involved a shift from hunting-gathering to raising animals and growing plants (subsistence farming). The second revolution used new technology and machinery for commercial farming, leading to better production and storage. The third revolution, or the Green Revolution, diffused technologies like GMOs (genetically modified organisms), pesticides, chemical fertilizers, and high-yield seeds. While it alleviated hunger and doubled the population, it caused environmental damage like soil salinization and desertification. Subsistence farming is for local consumption, while commercial farming is for profit. Intensive agriculture requires less land but more labor (e.g., plantation agriculture, market gardening), while extensive agriculture requires more land and less labor (e.g., shifting cultivation, pastoral nomadism, ranching). Land use patterns include clustered, dispersed, linear, and long lot (narrow land connected to a waterway).
Von Thunen’s Model predicts the arrangement of agricultural activities around a central market based on perishability and transportation costs. The rings start with dairy and horticulture (most perishable), followed by forest for lumber (costly to transport), then grain and field crops, and finally livestock (requires the most land). The Bid Rent Theory states that land is cheaper farther away from the city. Modern agricultural concepts include commodity chains (activities to produce a product), value-added crops, and aquaculture. Global supply chains connect producers and consumers across countries, sometimes leading to food deserts (areas lacking access to healthy food) or food insecurity. Solutions include fair trade, urban farming, and community-supported agriculture (CSA).
Urban Geography and Industrial Development
Urban patterns are explained by several models. The Concentric Zone Model features the Central Business District (CBD) at the center, followed by zones for lower-income residents and newer homes. The Hoyt Sector Model organizes zones in wedges. The Multiple Nuclei Model has multiple centers like regional districts or airports. The Peripheral/Galactic Model includes a central city surrounded by suburban areas and shopping malls. The Latin American City Model features a central market and squatter settlements. Urban hierarchy is often determined by the Rank-Size Rule, where the largest city has the population of the largest city, or by the presence of a primate city (more than twice the size of the next largest). Central Place Theory uses range (max distance a person will travel) and threshold (min people needed for a service) to explain city distribution.
Urban challenges include gentrification, where renovating urban areas displaces low-income residents, and redlining, where banks refuse loans to certain neighborhoods. Block-busting involves spreading misinformation to lower home prices based on ethnicity. Urban development strategies include smart growth (preserving farmland), new urbanism (walkable cities), and greenbelts. Economic development is categorized by sectors: primary (extracting resources), secondary (manufacturing), tertiary (services), quaternary (information processing), and quinary (high-level decision making).
Development theories include Rostow’s five stages: 1. Traditional, 2. Pre-take off (infrastructure improvement), 3. Take off (industrialization), 4. Drive to maturity (investment in social infrastructure), and 5. High mass consumption. Wallerstein’s World Systems Theory argues countries are divided into core, semi-periphery, and periphery based on interdependence. Economic production has moved from Fordism (mass production in one location) to post-Fordism (adaptable workforce in multiple locations). Globalization is supported by organizations like the World Trade Organization (WTO), the European Union (EU), and Mercosur, which reduce trade barriers like tariffs. To assist Less Developed Countries (LDCs), international lending agencies provide microloans and grants to reduce poverty and increase growth.