Chapter 1 Notes: Introduction to Geography

Chapter 1: Introduction

  • Learning Objectives
    • Define and explain what geography is
    • Describe the evolution of the discipline of geography
    • Explain the role of human geography
    • Compare and contrast absolute and relative location, site and situation, absolute and relative direction, absolute and relative distance
    • Summarize the concepts of density, dispersion, and pattern
    • Explain scale and discuss how it applies to maps
    • Define the term “region” and compare administrative, thematic, functional, and perceptual regions
    • Describe three major contemporary geospatial technologies

What is Geography?

  • Geography is more than just place names and locations; it is the study of spatial variation, of how and why things differ from place to place on the surface of the Earth.
  • Geography is about geographic space and its content.

Evolution of the Discipline

  • Fundamental inspiration: recognition of areal differentiation (spatial variation across space).
  • Three traditions of geographic thought:
    • A literary tradition
    • A cartographic tradition
    • A mathematical tradition
  • Geography as the “Mother of Sciences” contributing to other disciplines (examples): Anthropology, Geology, Ecology.

Ancient Period

  • Herodotus (484-425 BC): described lands, peoples, economies, and customs of the Persian Empire.
  • Eratosthenes (275-194 BC): coined the name Geography and measured Earth’s circumference; notable for early measurement methods.
  • Strabo (63 BC–23 AD): described various parts of the world; work Geographica ("Geography").
  • Ptolemy (90–168 AD): devised a map using parallels and meridians, influential for ~1500 years in Europe.
  • Visuals: Images of Herodotus, Eratosthenes, Strabo, and Ptolemy referenced in the slides.

Medieval Period

  • Idrisi (1099–1154 AD): Muslim geographer who collected known geographical information and assembled a comprehensive world guide (Roger’s Book).

Modern Period

  • Modern geography originates in the surge of scholarly inquiry in the 17th century.
  • By the end of the 19th century, geography had become a distinctive discipline in universities across Europe.

Interests of Geography

  • Areal variation on the Earth’s surface: examine relationships between human societies and the natural environments they occupy and modify.
  • Spatial systems: link physical phenomena and human activities in one area of the Earth with other areas.
  • Regional analysis: study human–environmental relationships and spatial systems in specific locational settings.

Human Geography

  • Emphasis:
    • Spatial variations in characteristics of peoples and cultures
    • The way humans interact over space
    • The ways humans utilize and alter the natural landscapes they occupy

Subfields of Human Geography

  • Population Geography
  • History Geography
  • Urban Geography
  • Social Geography
  • Economic Geography
  • Behavioral Geography
  • Cultural Geography
  • Political Geography

Core Geographic Concepts

Space and Place

  • Space implies areal extent:
    • Absolute space: objectively and physically real with measurable extent and boundaries.
    • Relative space: comparative and varies with context.
  • Place: attributes and values we associate with a location.

Absolute vs Relative Location

  • Absolute Location: identification of place by a precise and accepted system of coordinates (often called mathematical location).
  • Relative Location: position of a place in relation to other places or activities; expresses spatial interconnection and interdependence; may carry social and economic implications.

Site and Situation

  • Site: an absolute location concept; physical and cultural characteristics and attributes of the place.
  • Situation: the external relations of a locale; an expression of relative location with reference to items of significance to the place in question.

Location (Summary)

  • Distinction between Site and Situation continues to underlie how we describe places in relation to their surroundings.

Direction

  • Absolute Direction: based on global/macroscopic features such as cardinal points (North, South, East, West).
  • Relative Direction: culturally based and locationally variable (e.g., references like Middle East and Far East).

Distance

  • Absolute Distance: physical separation measured by a standard unit.
  • Relative Distance: transform linear measurements into more meaningful units for the spatial relationship in question (e.g., lines of equal travel time).

Size and Scale

  • Scale concepts across local, regional, and global studies; scale refers to the size of the unit studied.
  • In map terms, scale is the ratio between the length of a distance on a map and the actual length on the Earth’s surface:
      • ext{Scale} = rac{L{ ext{map}}}{L{ ext{Earth}}}
  • Small-scale maps cover a larger area with less detail; large-scale maps cover a smaller area with greater detail.

Physical & Cultural Attributes

  • Natural Landscape: climate, soil, water resources, minerals, terrain features; provides the setting for human actions.
  • Cultural Landscape: visible expression of human activity in an area (e.g., Hawksbill Crag, Broadway Bridge, Little Rock).

Interrelations Between Places

  • Distance Decay: interaction between places tends to diminish with distance.
  • Accessibility: ease or difficulty of overcoming time/distance barriers between spaces.
  • Connectivity: tangible and intangible ways places are linked.
  • Spatial Diffusion: process of dispersion of an idea or an item from a center of origin to more distant points with which it is connected.
  • Globalization: increasing interconnection of people and societies worldwide across social, cultural, political, economic, and environmental processes.

The Structured Content of Place

  • Density: number or quantity of a specific feature within a defined unit area; items in relation to the space where they are found.
  • Dispersion: the extent to which features within a distribution are spread out from each other or clustered together.
  • Pattern: the geometric arrangement of features in space.

Density vs. Dispersion

  • Density vs. dispersion illustrate different ways to describe how features occupy space.

Place Similarity and Regions

  • The physical and cultural content of an area and the dynamic interconnections of people and places show patterns of spatial similarity.
  • Regions are Earth areas that display significant elements of internal uniformity and external difference from surrounding territories.

Types of Regions

  • Administrative region: created by law, treaty, or regulation; includes political regions (countries, states), bureaucratic regions (school districts, voting districts), and cadastral (real estate) regions.
  • Thematic region (formal region): based on one or more objectively measurable themes or properties.
  • Functional region (nodal region): may be visualized as a spatial system; dynamic and organized; often have a core from which interaction originates.
  • Perceptual region (cognitive region): informal subjective regions defined by people’s beliefs, feelings, and images.

Regions and Examples

  • Examples shown include regions of large banks and their correspondent banks (illustrative figure from 1972) and a generalized land use map of Texas.

Maps

  • Maps are pictorial models of portions of the Earth’s surface and the distribution of features on the surface.
  • A map must depict the curved surface of the three-dimensional Earth on a two-dimensional sheet; all map projections distort one or more spatial properties.
  • Distortions can affect area, shape, distance, or direction.

Map Scale (Detailed)

  • Map scale is the relationship between the length of a feature on the map and the same item on the Earth’s surface.
  • Small scales cover a larger area with less detail; large scales cover a smaller area with greater detail.

The Globe Grid (Graticule)

  • A system of parallels and meridians symbolizing latitude and longitude.
  • All meridians are semicircles of equal length and converge at the poles.
  • All circles of latitude are parallel to the equator.
  • The grid system of parallels of latitude and meridians of longitude.

Latitude and Longitude

  • Latitude lines run parallel to the equator (
  • Longitude lines (meridians) converge at the poles; together they form the graticule used to identify precise global coordinates. Text references to the graticule appear in the slides.

How Maps Show Data

  • Cartography: art and science of maps and map-making.
  • Reference maps: general-purpose; show various natural or man-made features without analysis or interpretation.
  • Thematic maps: specific-purpose; present a spatial distribution or a single category of data (graphic theme).
    • Qualitative thematic maps
    • Quantitative thematic maps

Global Positioning System (GPS)

  • Components:
    • A system of N = 24 orbiting satellites
    • Earth-bound tracking stations
    • Portable receivers (GPS receivers)

Remote Sensing

  • The technique of acquiring information about an object or a process without direct physical contact using electromagnetic radiation.
  • Example: Landsat 8 satellite imagery.

Geographic Information Systems (GIS)

  • GIS extends the use of digitized data and computer manipulation to investigate and display spatial information.
  • A model of a GIS.

Mental Map

  • Mental maps are internal representations of an area or environment developed by an individual based on information or impressions received, interpreted, and stored.
  • Example: Four mental maps of Los Angeles (illustrative figures).

Systems, Maps, and Models

  • Spatial System: the content of an area is interrelated and constitutes a spatial system; component parts are interdependent.
  • Model: a simplified abstraction of reality designed to clarify relationships between components.
  • Maps are a type of model, representing reality in an idealized form to make certain aspects clearer.

Geospatial Technologies in Context

  • Three major contemporary geospatial technologies highlighted: GPS, Remote Sensing, GIS (as shown in the learning objectives).
  • These technologies enable data collection, analysis, and visualization of spatial patterns and processes across scales.