Basic Map Projections AP Human Geography. Distortion and Projection All maps have distortion. Why?...
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Transcript of Basic Map Projections AP Human Geography. Distortion and Projection All maps have distortion. Why?...
![Page 1: Basic Map Projections AP Human Geography. Distortion and Projection All maps have distortion. Why? Best projection? Depends on how you use the map?](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649f495503460f94c6ad0c/html5/thumbnails/1.jpg)
Basic Map Projections
AP Human Geography
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Distortion and Projection
• All maps have distortion. Why?• Best projection? Depends on how you use the
map?
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Mercator (1569)
• Designed to aid ships; good at finding location; bad at distortion of poles
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Robinson Projection
• Good at fixing pole distortion; good for general use (common in classrooms)
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Peters Projection (1974)
• Controversial; b/c distorts familiar land shapes• Corrects distortions of Africa and S. America
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Types of Thematic Maps
• Dot Maps
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Isoline
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Choropleth
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Cartogram
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Proportional Symbol Map
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Scale
• Displaying the same geographical features at various scales may also depict misleading results.
• For example….
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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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NYC = Texas?
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SO Cal = Texas?