1. Understanding Maps- Cartography

2. The Olde World

3. Maps vs. Globes 2 dimensional Flat Distorted Shows small details Handy/can fold 3 dimensional Spherical More accurate Shows large details inconvenient

4. Map vs. Globe

5. Which is bigger … Greenland, Mexico or Australia

6. Map Projections Mercator Gnomonic/Azimuthal Conic

7. MERCATOR PROJECTION Made as if you wrapped a cylinder around a globe Parallels and Meridians appear as straight lines Accurate at equator Distorted at poles

8. Gnomonic/Azimuthal Projection Made as if paper touched one point on globe Useful for air travel/navigation Accurate at point of contact Uneven spacing between parallels

9. Conic Projection Made by placing paper cone over globe Cone touches along one parallel Accurate at that point Used for mid latitude navigation Many sections- polyconic

10. GREAT CIRCLE Any circle that divides the globe into 2 equal halves Useful in navigation Shows the shortest distance between 2 points

11. Reading a Map LEGEND—symbols used to interpret a map (see p 60) MAP SCALE- indicates the relationship between distance on a map and distance on Earth A) GRAPHIC B) FRACTIONAL C) VERBAL

12. GRAPHIC SCALE Shows a printed line divided into parts and labeled You can measure distance with a ruler and compare to line

13. Fractional Scale States the map scale as a ratio Ex.: 1:24 000 means one unit on the map equals 24000 units on the Earth

14. Verbal Scale Makes a written statement in words expressing the scale Ex.: “One centimeter equals one Kilometer” Ex. : “One inch equals 5.2 miles.”

15. They all mean the same thing.

17. Topographic Map Scales

19. http://academic.brooklyn.cuny.edu/geology/ leveson/core/wayne_web/distance%20and %20direction/scale-direction-ex2.htm