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# Chapter 6 3

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### Chapter 6 3

1. 1. Chapter 6-3 Maps
2. 2. What Are Maps??? <ul><li>models of the Earth’s surface presented on paper! </li></ul>
3. 3. Projections <ul><li>Many maps are made as projections </li></ul><ul><ul><ul><ul><li>when points and lines on a globe’s surface are transferred onto paper </li></ul></ul></ul></ul>***All types of projections distort the shapes of landmasses or their areas ***
4. 4. 1) Mercator Projection <ul><li>mainly used on ships </li></ul><ul><li>project correct shapes of continents, but the areas are distorted </li></ul>
5. 5. Mercator <ul><li>lines of longitude are projected onto the map parallel to each other. </li></ul><ul><li>This creates a distortion. </li></ul><ul><li>- only lines of latitude </li></ul><ul><li>are truly parallel- </li></ul>
6. 6. Mercator <ul><li>because of this areas at the poles appear bigger than they are on this type of projection </li></ul><ul><ul><ul><li>example – compare Greenland to either S. America or India </li></ul></ul></ul>
7. 7. 2) Robinson Projection <ul><li>shows accurate continent shapes and more accurate land areas </li></ul><ul><li>lines of latitude run parallel (as they should) and lines of longitude are curved as they are on a globe </li></ul>
8. 8. Robinson
9. 9. Robinson <ul><li>there is less distortion near the poles </li></ul>
10. 10. 3) Conic Projection <ul><li>used to produce maps of small areas (road maps, weather maps) </li></ul><ul><li>made by projecting points and lines from a globe onto a cone </li></ul><ul><li>most useful for middle latitude regions, less useful for polar regions </li></ul>
11. 11. Conical
12. 12. Geologic Maps <ul><li>useful to Earth scientists </li></ul>
13. 13. Geologic Maps shows the arrangement of rocks at the Earth’s surface
14. 14. Geologic <ul><li>- used to find and extract natural resources </li></ul>
15. 15. Three Dimensional Maps <ul><li>often created with computers </li></ul>
16. 16. 3d Maps
17. 17. Remote Sensing <ul><li>techniques used to collect information about Earth from a distance, often using satellites </li></ul>
18. 18. <ul><li>Landsat satellites take pictures of Earth’s surface using different wavelengths of light </li></ul>
19. 19. <ul><li>images can be used to make maps such as amount of snow cover, or impact of forest fires </li></ul>
20. 20. <ul><li>Global Positioning System (GPS): uses 24 satellites sending position and time signals to allow a person to calculate his or her exact position. </li></ul>
21. 21. GPS <ul><li>send radio signals </li></ul><ul><li>used to navigate, </li></ul><ul><li>create detailed maps, </li></ul><ul><li>track wildlife </li></ul>