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Basic Map Projections AP Human Geography. Distortion and Projection All maps have distortion. Why? Best projection? Depends on how you use the map?

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Presentation on theme: "Basic Map Projections AP Human Geography. Distortion and Projection All maps have distortion. Why? Best projection? Depends on how you use the map?"— Presentation transcript:

1 Basic Map Projections AP Human Geography

2 Distortion and Projection All maps have distortion. Why? Best projection? Depends on how you use the map?

3 Mercator (1569) Designed to aid ships; good at finding location; bad at distortion of poles

4 Robinson Projection Good at fixing pole distortion; good for general use (common in classrooms)

5 Peters Projection (1974) Controversial; b/c distorts familiar land shapes Corrects distortions of Africa and S. America

6 Dot Maps

7 Isoline

8 Choropleth

9 Cartogram

10 Proportional Symbol Map

11 Scale Displaying the same geographical features at various scales may also depict misleading results. For example….

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

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19 NYC = Texas?

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23 SO Cal = Texas?

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