1. August 20, 2013 Agenda Review HW Maps Lie Types of Map Identification
Work on HW
EQ- Can maps be trusted?
Table of Contents:
12. Projections and Types of Maps
13. HW Charts
14. Ch1 Questions #18-24
HW:
Create a chart that identifies the definition and an example of toponym, site, situation, and mathematical location.
Read pages and answer questions
Create a chart that identifies the definition and an example of formal, functional and vernacular regions.

2. All Maps Lie....
Because the world is a sphere and maps are flat, there will always be some degree of distortion. The next several slides will display some of the more popular distortions.

3. Projection- method of transferring locations on the Earth’s surface
Types of Distortion:
Shape
Distance
Relative Size
Direction

4. Good for showing accurate shape, polar areas much larger than real life

5. Shows shape
and size accurately but distorts location
Advertised as the non-racist map 

7. Distorts shape and size

8. Size is accurate but distance and direction are distorted

9. Size is accurate but shape and direction are distorted

10. Sizes are good relative to each other, some shape distortion
“Equal Area Projection”

11. Proportion used in legend may be misleading

13. Propaganda Maps- maps that lie with a political purpose
German map pre-WWII to show the threat of Czech bombers

14. CIA Map of Afghanistan, 1982

15. Types of
Thematic
Maps

16. Dot Maps
Use a concentration of dots to show locale of specific characteristic

17. Isoline Maps

18. Proportional Symbol US Population
Shape gets larger depending on concentration

19. Color shading to show degree of concentration
Choropleth Map
Color shading to show degree of concentration

20. Using your text books, atlases and the post-it notes, locate and “label” one map of each type. Show these to me for a grade when complete!

21. Scale
Displaying the same geographical features at various scales may also depict misleading results.

22. This map shows the total number of African-Americans per state
This map shows the total number of African-Americans per state. Examine Georgia.

23. In the previous slide, Georgia had one of the highest number of African-Americans, but a closer look tells a different picture. The dark red is the Atlanta metropolitan area.

24. Using Census Tracts of the Atlanta Metropolitan Area, a different scale gives different results.

26. Manipulating
Data
Data may also distort desired results. The following slides show how population of a particular cohort may be misleading.

27. This map shows the percentage of African-Americans living within counties across the US.

28. This map shows the total number of African-Americans living in each county across the US.

29. These four New York counties (New York, Kings, Queens, and Bronx) have a combined African-American population of 2,121,882 and outnumbers the total number of African-Americans in the entire state of Texas 2,021,632

31. A similar comparison can be made with Hispanics living in the US
A similar comparison can be made with Hispanics living in the US. This map shows the total percentage of Hispanics in each county.

32. This map displays the total number of Hispanics in each US county.

33. These three Southern California counties (Los Angeles, Orange, and San Diego) have a total Hispanic population of 5,045,726 which is greater than the total Hispanic population of Texas at 4,339,905. New Mexico has the greatest percentage of Hispanics (33%), it’s total Hispanic population is 579,224.

34. US Population
The map below shows the US population divided into Natural Breaks. In this case, the natural breaks are near the 7,000,000 mark.

35. US Population
This map shows US population in Quintiles. In this map, states are classified into five separate categories based on population. The dark red represents the states in the top one-fifth. The total population in each state has not changed; however, the way that it is classified has changed.

36. Natural Breaks
Quintile