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Topography - PowerPoint PPT Presentation


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Topography. The shape of the earth’s surface. Topography. Elevation- Height above sea level Relief- change in elevation Maps represent the earth’s surface Scales – compare distances Legend – explains the symbols on the map. Topographical Maps. Show relief of the land

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topography

Topography

The shape of the earth’s surface.

topography1
Topography
  • Elevation- Height above sea level
  • Relief- change in elevation
  • Maps represent the earth’s surface
    • Scales – compare distances
    • Legend – explains the symbols on the map.
topographical maps
Topographical Maps
  • Show relief of the land
    • Contour lines – Line of equal elevation
    • Contour Interval – change in elevation from one line to the next
    • Index Contours – elevations in rounded units indicated by darker lines
rules for topographical maps
Rules for Topographical Maps
  • A contour line of one elevation never crosses another contour line.
  • Closely spaced contour lines represent steep slopes. Lines that are far apart represent gentle slopes.
  • Contour lines that cross a valley are “V” shaped and the V points to higher elevations. If the V points to lower elevations you have a ridge.
rules cont
Rules Cont.

4. Contour lines form closed loops around hill tops. Depressions are shown with hachure marks.