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Map Projections
Distortion: Maps are distorted representations of the globe due to projecting a 3D object onto a 2D surface.
Types of Map Projections:
Mercator Projection: Conformal, accurate direction, used for naval purposes; distorts size and location of landmasses (e.g., Greenland appears larger than Africa).
Goode Homolosine Projection: Equal area, pseudo-cylindrical; accurate land mass size and shape, but distorted distances.
Robinson Projection: Minimizes distortion by spreading it across entire map; more distortion near poles.
Gall-Peters Projection: Accurate land mass size, distorts shape and direction.
Types of Maps
Reference Maps: Show geographic features, boundaries, and toponyms; used for directions, property lines, political boundaries, etc.
Topographic Maps: Use contour lines to show terrain and elevation changes.
Thematic Maps: Display spatial patterns using quantitative data.
Choropleth Maps: Use colors/shades to represent data quantities.
Dot Density Maps: Display data distribution with dots; can be clustered or dispersed.
Graduated Symbol Maps: Use symbols to show data quantity; can overlap.
Isoline Maps: Connect areas with similar data values (e.g., weather maps).
Cartogram Maps: Represent data with area size (e.g., population).
Flowline Maps: Show movement of goods, people, ideas.
Geographic Data Collection
Remote Sensing: Satellites collect information for geographic information systems (GIS).
GIS: Analyzes and displays geographic data in layers.
GPS: Provides absolute location data.
Field Observations: In-person or digital data collection through observation.
Personal Interviews: Collect unique perspectives via questioning.
Media Reports: Use newspapers and media to gain insights.
Government Documents: Laws and policies provide cultural and system insights.
Travel Narratives: Personal perspectives and experiences.
Landscape/Photo Analysis: Study changes and human impact through geospatial images.
Types of Data
Qualitative Data: Word-based, subjective; collected via observations and interviews.
Quantitative Data: Number-based, objective; collected through census and demographic data.
Use of Geographic Data
Changing Scale: Provides different insights at local, national, and global levels.
Local Scale: Detailed view, sees data points clearly.
National Scale: Understands spatial relationships within countries.
Global Scale: Observes broader patterns, generalizes data.
Applications:
Governments: Plan zoning, infrastructure, laws based on data.
Businesses: Understand markets, economic trends.
Individuals: Use for navigation, moving, and understanding global context.
Spatial Concepts and Interaction
Absolute vs. Relative Location: Exact coordinates vs. relation to surrounding area.
Sense of Place: Emotional response to a place, influenced by unique features and personal memories.
Spatial Associations: Observe density, concentration, and patterns.
Density: People/objects in an area.
Concentration: Clustering or dispersal of people/objects.
Pattern: Arrangement of objects (e.g., grid, linear).
Time-Space Compression: World feels smaller due to technological advancements.
Distance Decay: Interaction decreases with increasing distance.