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Maps and Mapping

Maps and Mapping. How High or How Low…Can you go?. Maps. There are many different kinds of maps that are used for many different purposes . Think about it. What are some of the different kinds of maps that you have seen or used?

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Maps and Mapping

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  1. Maps and Mapping How High or How Low…Can you go?

  2. Maps There are many different kinds of maps that are used for many different purposes.

  3. Think about it • What are some of the different kinds of maps that you have seen or used? • Talk with your partner and come up with 5 different types of maps or 5 different things we could map

  4. Different types of maps • Examples of maps • Road or street • Weather • Topographic • Shaded relief

  5. How do you make an accurate map? • Start with a point of reference • Longitude • Imaginary lines • Run north and south but measure EAST AND WEST • Prime Meridian • Latitude • Imaginary lines • Run east and west but measure NORTH AND SOUTH • Equator

  6. Why make accurate maps? • Location • Reference for everyone in world

  7. What must be on ALL maps • Scale • Legend • Location/title • Key • Longitude/latitude • Magnetic declination

  8. Types of maps a geologist would use • Shaded Relief • Topographic or Contour

  9. Shaded Relief Map • A shaded relief map is designed to highlight the physical features of an area of land. • It shows relative elevations. • This kind of map shows height through shading and coloring variations.

  10. Shaded Relief Map

  11. Contour Maps • A contour or topographic map shows the elevation of the land at all points. • It can be used to calculate the absolute elevationof any given place. • This kind of map shows height variations through the use of contour lines.

  12. Contour Map

  13. Contour Lines • Contour lines are imaginary lines that connect points of equal elevation. • The contour interval or change in elevation from one contour line to the next is always consistent.

  14. Contour Lines • Hills are indicated by closed contours. • Depressions or large dips are indicated by closed contours with hachure lines that point downhill.

  15. Contour Lines • The spacing between contour lines shows the gradient. • Closely spaced lines indicate a steep slope. Contours spaced far apart represent gentle slopes.

  16. “Check Point” • Which is higher, hill A or hill B? • Which hill is steeper? • How high is the area between the hills?

  17. Here is the same contour map along with a cross section diagram of the area...

  18. “Check Point” Match the cross-sections on the left with a contour map on the right...

  19. Answers... 1 - B 2 - E 3 - D 4 - C 5 - A

  20. “Think About It” How might a contour (topographic) map be of assistance if you were: • planning a housing development... • building a road... • choosing which hiking trail to take... • selecting where to put a new airport...

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