1 / 19

Thinking Geographically

Thinking Geographically. How do geographers address where things are?. Maps. Cartography Serve 2 purposes Reference source (provide a route) Communication tool (provide data) Babylonians 2300 B.C. on clay tablets & earlier Polynesian people “stick-charts” Maps as art.

marshaw
Download Presentation

Thinking Geographically

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Thinking Geographically How do geographers address where things are?

  2. Maps • Cartography • Serve 2 purposes • Reference source (provide a route) • Communication tool (provide data) • Babylonians 2300 B.C. on clay tablets & earlier • Polynesian people “stick-charts” • Maps as art

  3. Eratosthenes 194BC?

  4. Al-Idrisi 1154

  5. Ortelius 1571

  6. Map Scale • Amount of detail, how much “zoomed in” • Relationship between a feature’s size on a map to its actual size on Earth • Fraction or Ratio, Written statement, bar or….. • Local, regional, national, global

  7. Projection • Most accurate representation of the earth is a globe • Scientific method of transferring locations on Earth’s surface to a flat map • “All maps lie flat, and all flat maps lie” • Distortion in • Shape • Area • Distance • Direction

  8. West Wing

  9. True Size

  10. Cont’d… • Equal area – Distortion at poles (shape) • Mercator – Distortion at poles (size) • Polar – Shows relative closeness between US & former USSR • Robinson – Better portrays relationship between land & water

  11. Cont’d… • Van Der Grinten – Shows Canada & Russia 200% bigger than they are • Dymaxion – attempt to show global connections in a worldwide ocean • Mollweide – attempt to avoid high latitude distortions • “Interuption”

  12. GIS • Geographic Information System • Computer system that stores information in ‘layers’ • Helps draw connections between various information • Crime & Air Pollution • Low income families & teenage pregnancies • Retirement homes & hospitals • Cancer rates & Native Canadians

  13. GPS • Global Positioning System • 24 satellites that tell us the exact location of something on the earth • Aircrafts, ships, now quite common in cars • Originally for US defence, available to citizens within last 20 years

More Related