Comprehensive Notes on Geographic Science, Tools, and History

Defining Geography and Key Issues

Geography is defined as the scientific study of where people and activities are found on the surface of the Earth and the underlying reasons for their distribution at those specific locations. The discipline utilizes various tools that are currently essential for the delivery of online services through electronic devices. The study is organized into several key areas of inquiry:

• Why Is Geography a Science?: This involves understanding geography as a study of location and the logic behind spatial distributions.

• Why Is Every Place Unique?: Geographers examine the specific combination of features that make each area or region distinct from all others.

• Why Are Different Places Similar?: Research focuses on features organized in a regular manner across space, involving both global regularities and local characters.

• Why Are Different Places Connected?: A central tenet of geography is the emphasis on connections between human activities and the physical environment, with a specific focus on sustainability.

Principal Locations and Concepts Explored

Geographers analyze spatial relationships across a diverse range of locations worldwide, including:

• North America: Preble County, San Francisco, Washington, Mississippi, Everglades, Chicago, Boston, Houston.

• Europe and Eurasia: Paris, Dover, The Netherlands, Ukraine, Istanbul, Greece (Athens).

• Asia: Tokyo, Yoshino, Wuhan, Kolkata.

• Australia and Oceania: Canberra, Christmas Island.

• Africa: Sierra Leone.

• Latin America: Chichicastenango.

Key academic themes include diffusion, map scale, GIScience, sustainability, site and situation, patterns, gender and ethnicity, cartography, place and space, uneven development, globalization, and spatial interaction.

Geography as a Science

The term "geography" was invented by the ancient Greek scholar Eratosthenes and is derived from two Greek words: Geo (Earth) and graphy (to write). Human geographers approach their work by asking two fundamental questions:

1. Where are people and activities found on Earth?

2. Why are they found there?

Geographic thought is rooted in prehistoric human survival, such as observing and recording routes across natural barriers like rivers or hills. Modern human geography focuses on two primary features of human behavior:

• Culture: Explaining the spatial arrangement of languages, religions, and ethnicities.

• Economy: Examining the distribution of agriculture, manufacturing, and services.

Basic Geographic Concepts

Uniqueness of Place and Region

• Place: A specific point on Earth distinguished by a particular characteristic. Every place occupies a unique location or position. For example, Wuhan, China, is the specific place where COVID-19 was first identified in December $2019$.

• Region: An area of Earth defined by one or more distinctive characteristics. An example is the Hubei province in China, which functioned as a region with a higher concentration of COVID-19 cases ($above 115 \text{ per } 100,000$ in $2020$) compared to other Chinese provinces.

jmn. jjjmu. Interrelatedness of Locations

• Scale: The relationship between the portion of Earth being studied and the Earth as a whole. Scales range from local (e.g., preservation of cultural activities) to global (e.g., climate change or energy resource depletion).

• Space: The physical gap or interval between two objects. Geographers study why objects are distributed across space in regular manners, such as the recommendation of a $2-meter$ ($6-foot$) social distance during the pandemic.

• Connection: The relationships among people and objects across the barrier of space. This includes methods of movement and communication, such as the quarantine of travelers from Wuhan to Christmas Island and their eventual arrival at Canberra Airport.

Comparing Geography and History

Drawing from the framework of Immanuel Kant ($1724-1804$), geography and history are compared based on their primary methods of organization:

• Geography: Identifies the location of places; explains why human activities are found near one another; asks "where" and "why"; organizes material spatially; and recognizes that actions at one point on Earth result from and affect conditions elsewhere.

• History: Identifies the dates of events; explains why human activities follow a chronological order; asks "when" and "why"; organizes material chronologically; and recognizes that actions result from the past and affect the future.

• Practical Distinction: Geographers can physically travel to other places to study the Earth's surface firsthand, whereas historians cannot travel to past eras.

Contemporary Geographic Tools

Mapping and Cartography

A map is a two-dimensional or flat-scale model of the Earth's surface. Cartography is the science of mapmaking, now heavily supported by computers and satellites. Maps serve two roles:

1. Reference Tool: Finding the shortest route and learning where things are in relation to known places.

2. Communications Tool: Depicting the distribution of human activities or physical features.

GIScience and GIS

• Geographic Information Science (GIScience): The analysis of data about Earth acquired through electronic technologies.

• Geographic Information System (GIS): Captures, stores, queries, and displays geographic data using layers. Standard layers include boundaries, elevation, geographic names, hydrography, land cover, orthoimagery, structures, and transportation.

• Photogrammetry and Remote Sensing: Photogrammetry is the science of taking measurements from photographs. Remote sensing is the acquisition of data from satellites, airplanes, or drones. These tools help create $3D$ virtual representations and measure changes over time.

GPS and Geocoding

• Global Positioning System (GPS): A system determining precise position using approximately $24$ satellites, tracking stations, and receivers. It is vital for navigation in aircraft, ships, and land vehicles.

• Geotagging: Identification and storage of information by its precise latitude and longitude coordinates.

• What3words: A geocode system that divides the world into $57 \text{ trillion}$ squares, each measuring $3 \times 3 \text{ meters}$ ($9 \text{ square meters}$ or $100 \text{ square feet}$). Each square is identified by a unique three-word combination (e.g., the White House front door is identified as ///curve.empty.buzz).

Volunteered Geographic Information (VGI)

• VGI: Geographic data contributed voluntarily and for free by individuals. It is associated with citizen science (amateur research) and Participatory GIS (PGIS) (community-based mapping).

• OpenStreetMap: A collaborative, editable map project. The Humanitarian OpenStreetMap Team (HOT), co-founded by geographer Kate Chapman, uses this data for sustainable development and disaster response, such as mapping Ebola-affected areas in Sierra Leone or hurricane damage in Puerto Rico.

• Mashup: A map that overlays data from one source on top of a mapping service like Google Maps, facilitated by an Application Programming Interface (API).

Development of Geographic Science

Prehistoric and Ancient Contributions

• Earliest Map: A map found on a house wall in Çatalhöyük (present-day Türkiye), dating to approximately $6200\text{ B.C.E.}$, depicting the town and the eruption of the Hasan Dađl volcano.

• Thales of Miletus ($ca. 624-ca. 545\text{ B.C.E.}$): Applied geometry to measuring land area.

• Anaximander ($610-ca. 546\text{ B.C.E.}$): Created a world map based on sailors' reports and proposed a cylinder-shaped world.

• Pythagoras ($ca. 570-ca. 495\text{ B.C.E.}$): First to propose a spherical Earth.

• Hecataeus ($ca. 550-ca. 476\text{ B.C.E.}$): Wrote Periodos Ges ("Journey Around the Earth"), likely the first geography book.

• Aristotle ($384-322\text{ B.C.E.}$): Provided evidence demonstrating Earth's spherical shape.

• Eratosthenes ($ca. 276-ca. 194\text{ B.C.E.}$): Calculated Earth's circumference within $0.5\text{ percent}$ accuracy and divided the world into five climatic regions.

• Strabo ($ca. 64\text{ B.C.E.}-ca. 24\text{ C.E.}$): Produced the $17\text{-volume}$ Geographica.

• Ptolemy ($ca. 100-ca. 170\text{ C.E.}$): Wrote the $8\text{-volume}$ Geographia and established mapmaking principles that remained unmatched for a millennium.

Asian and African Contributions

• Yu Gong ("Tribute of Yu"): A $5\text{th-century B.C.E.}$ Chinese text describing provincial economic resources.

• Pei Xiu ($224-271\text{ C.E.}$): Known as the "father of Chinese cartography."

• Muhammad al-Idrisi ($1100-1165$): Arab geographer who updated Ptolemy's work with a world map and text in $1154$.

• Ibn Battuta ($1304-ca. 1368$): Moroccan scholar who traveled over $120,000 \text{ kilometers}$ ($75,000 \text{ miles}$) across Africa, Europe, and Asia, recorded in his book Rihla.

European Renaissance and Revival

• Martin Waldseemüller ($ca. 1470-1520$): First to label the new landmasses as "America."

• Abraham Ortelius ($1527-1598$): Created the first modern atlas and hypothesized continental drift.

• Bernhardus Varenius ($1622-1650$): Wrote Geographia Generalis, the standard systematic geography text for over a century.

The Geographic Grid and Time

Latitude and Longitude

• Meridian: An arc connecting the North and South poles, identified by longitude. The Prime Meridian ($0^{\circ}$ longitude) passes through Greenwich.

• Parallel: A circle drawn around the globe parallel to the equator, identified by latitude.

• Coordinates: Locations are expressed in degrees, minutes, and seconds. For example, Philadelphia is at $39^{\circ} 57' 9'' N$ latitude and $75^{\circ} 9' 55'' W$ longitude.

Standard Time and the International Date Line

• Earth is divided into $360^{\circ}$ of longitude. By dividing $360^{\circ}$ by $15^{\circ}$, $24$ time zones are established, representing each hour of the day.

• Coordinated Universal Time (UTC): Also known as Greenwich Mean Time (GMT), it is the master reference time.

• International Date Line: Located primarily at $180^{\circ}$ longitude. Crossing it heading east (toward America) moves the clock back $24$ hours; heading west (toward Asia) moves the calendar ahead one day.

Map Types and Geographic Data Visualization

• Choropleth Map: Shaded or patterned areas in proportion to data (e.g., COVID-19 deaths per capita).

• Graduated Symbol Map: Graphics (like circles) vary in size depending on the value of data.

• Isoline Map: Lines connect places with the same values, often used to show the timing of pandemic spread.

• Dot Distribution Map: Points represent a predetermined number of observations to show clustering.

• Cartogram: The size of an area is distorted to be proportional to a specific data value.

Map Scale and Distortion

Scale refers to the relationship of a feature's size on a map to its actual size on Earth. It is presented in three ways:

1. Ratio/Fraction: (e.g., $1:1,000,000$).

2. Written Scale: (e.g., "$1 \text{ centimeter equals } 10 \text{ kilometers}$ ").

3. Graphic Scale: A bar line used to measure distance.

Map Projections and Distortion

Projection is the scientific method of transferring Earth's spherical surface to a flat map. Four types of distortion can occur:

1. Shape: Areas can appear more elongated or squat.

2. Distance: Increased or decreased between two points.

3. Relative Size: One area appears larger than another despite being smaller in reality.

4. Direction: Can be distorted from one place to another.

Common World Projections:

• Winkel Projections: Equal area, minimizes shape distortion, but distorts polar regions (Greenland and Antarctica).

• Mercator Projections: Shape and direction are accurate, but relative size is grossly distorted at high latitudes.

• Goode Homolosine Projections: Interrupted map that gives prominence to landmasses but distorts angles.

• Gall-Peters Projections: Maintains relative size but distorts shape.

Questions & Discussion

Q: What are the principal connections from your hometown to other places?

• The connection depends on specific localized infrastructures like highways, digital networks, and economic trade routes.

Q: What is an example of a mashup done for your community?

• Examples include local crime maps, transit trackers that provide real-time bus locations over a standard map, or community-contributed restaurant reviews mapped spatially.

Q: What is one main difference between the world maps of Ptolemy and Waldseemüller?

• Waldseemüller's map includes the Americas (labeled "America") and shows a much more expansive, global view of the world compared to Ptolemy’s map, which focused primarily on the Roman Empire's known extent around the Mediterranean and Indian Ocean.

Q: Use an online search tool to find the longitude and latitude of your community.

• Specific coordinates vary by city; for instance, Philadelphia is approximately $39.9^{\circ} N, 75.1^{\circ} W$.

Q: Compare the sizes of Greenland and South America in the Winkel, Mercator, Goode Homolosine, and Gall-Peters projections. Which of the two landmasses is actually larger?

• South America is significantly larger than Greenland. South America is approximately $17.8 \text{ million square km}$, while Greenland is about $2.1 \text{ million square km}$. The Mercator projection specifically makes Greenland appear roughly the same size as South America, which is a distortion of relative size.**