topographic maps
Post on 15-Jun-2015
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Topography
•Topography – variations in elevation over a landscape.
Contour Lines•How can a flat map show steep
or shallow an uneven surface on earth?
•Contour lines: line that connects points of equal elevation.–Drawn at a set elevation (every 10m, 50m, 100m , etc.)
–Closer the lines the steeper the elevation and vice versa.
Contour Lines• Index Contour:
darkest, labeled contour line.
• Contour interval: contour lines that are not labeled.
• Closed Contour: indicates a top of a hill or mountain.
• Hachure: contour line with dashes.
600m
600m
Slope• Steepness of the land is called slope• Contour lines that are spread apart
indicate a gentle slope.• While contour lines that are very close
depict a steep slope.
Using Topographic Maps
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