Topographic Maps
<ul><li>Topographic maps model the changes in Earth’s elevation. </li></ul>
How are topographic maps useful? <ul><li>Determine your location relative to identifiable natural features  </li></ul><ul>...
 
 
What is a contour line?  <ul><li>A line on a map that connects points of equal elevation. </li></ul>
What is a contour interval? <ul><li>The difference in elevation between two side-by-side contour lines. </li></ul><ul><li>...
What can you tell from contour lines? <ul><li>Contour lines that are close together = steep elevation </li></ul><ul><li>-M...
What is an index contour? <ul><li>A contour line that is marked with the elevation number. </li></ul>
How are index contours useful? <ul><li>You can determine the elevation of other lines around the index contour by adding o...
Contour lines always point upstream on rivers.
Basins and craters are represented with hachures
What do different colors indicate on topo. Maps? <ul><li>Green = area with vegetation </li></ul><ul><li>White = area with ...
Map Scales <ul><li>The relationship between the distances on the map and distances on Earth’s surface. </li></ul><ul><li>S...
 
Map Legends <ul><li>Topographic maps and most other maps have a legend. </li></ul><ul><li>A map legend explains what the s...
 
 
 
Map Series <ul><li>A map series includes maps that have the same dimensions of latitude and longitude.  </li></ul><ul><li>...
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Topographic maps

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Topographic maps

  1. 1. Topographic Maps
  2. 2. <ul><li>Topographic maps model the changes in Earth’s elevation. </li></ul>
  3. 3. How are topographic maps useful? <ul><li>Determine your location relative to identifiable natural features </li></ul><ul><li>Topographic maps also indicate cultural features such as roads, cities and dams </li></ul><ul><li>Often used by hikers </li></ul>
  4. 6. What is a contour line? <ul><li>A line on a map that connects points of equal elevation. </li></ul>
  5. 7. What is a contour interval? <ul><li>The difference in elevation between two side-by-side contour lines. </li></ul><ul><li>This # is constant for each map </li></ul>
  6. 8. What can you tell from contour lines? <ul><li>Contour lines that are close together = steep elevation </li></ul><ul><li>-Mountains, ridges, valleys </li></ul><ul><li>Contour lines that are far apart = </li></ul><ul><li>slight change in elevation. </li></ul>
  7. 9. What is an index contour? <ul><li>A contour line that is marked with the elevation number. </li></ul>
  8. 10. How are index contours useful? <ul><li>You can determine the elevation of other lines around the index contour by adding or subtracting the contour interval number. </li></ul>
  9. 11. Contour lines always point upstream on rivers.
  10. 12. Basins and craters are represented with hachures
  11. 13. What do different colors indicate on topo. Maps? <ul><li>Green = area with vegetation </li></ul><ul><li>White = area with little to no vegetation </li></ul><ul><ul><ul><ul><ul><li>Cities, deserts, etc. </li></ul></ul></ul></ul></ul><ul><li>Purple = dark - revisions to the map </li></ul><ul><li> light - urban areas </li></ul>
  12. 14. Map Scales <ul><li>The relationship between the distances on the map and distances on Earth’s surface. </li></ul><ul><li>Scale is often represented as a ratio. </li></ul><ul><li>Example: 1:80 </li></ul><ul><ul><li>This means that one unit on the map represents 80 units on land. </li></ul></ul><ul><ul><li>The unit of distance could be feet, miles, millimeters, etc. </li></ul></ul>
  13. 16. Map Legends <ul><li>Topographic maps and most other maps have a legend. </li></ul><ul><li>A map legend explains what the symbols used on the map mean. </li></ul><ul><li>Some frequently used symbols on topographic maps are shown in the appendix in the back of your book on </li></ul><ul><li>p. 806 </li></ul>
  14. 20. Map Series <ul><li>A map series includes maps that have the same dimensions of latitude and longitude. </li></ul><ul><li>For example, one map series includes maps that are 7.5 minutes of latitude by 7.5 minutes of longitude. </li></ul>

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