Topography

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# Topography - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about 'Topography' - trula

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Presentation Transcript

### 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
• 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
• 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.

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