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Questions and Answers
What is the purpose of contour lines on a topographical map?
What do the numbers on contour lines indicate?
What is the significance of thickened contour lines on a map?
What does a contour line that closes within the limits of the map indicate?
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Why are contour lines more closely spaced on steep slopes?
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What is the purpose of Intermediate Contour Lines?
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What do contour lines show about the shape of land?
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What is the main purpose of a contour map?
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Why are contour lines numbered?
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What do closely spaced contour lines indicate?
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What is the purpose of Index Contours?
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What does a contour line that does not close within the limits of the map indicate?
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Study Notes
Contour Maps
- A contour map is a type of topographic map that shows the elevation of land using contour lines.
- A contour line is an imaginary line joining places having the same height above sea level.
Contour Features
- Contour lines are numbered and indicate the height above sea level.
- The numbers should be read on the higher side or as the land slopes up.
- Contour lines eventually close, either on the map or beyond its margins.
Spacing of Contour Lines
- Contour lines are widely spaced on gentle slopes.
- Contour lines are closely spaced on steep slopes.
- Evenly spaced contour lines indicate a uniform slope.
Index Contours and Intermediate Contours
- To simplify the map, contour lines may be thickened at regular intervals (e.g., every 100 meters).
- These thickened lines are called Index Contours.
- Thinner lines between index contours are called Intermediate Contour Lines.
Interpretation of Contour Maps
- A contour line that closes within the limits of the map indicates a hill, plateau, or ridge.
- Topographical maps (or contour maps) show elevation (height above or below sea level) and shape of land using contour lines.
Contour Maps
- A contour map is a type of topographic map that shows the elevation of land using contour lines.
- A contour line is an imaginary line joining places having the same height above sea level.
Contour Features
- Contour lines are numbered and indicate the height above sea level.
- The numbers should be read on the higher side or as the land slopes up.
- Contour lines eventually close, either on the map or beyond its margins.
Spacing of Contour Lines
- Contour lines are widely spaced on gentle slopes.
- Contour lines are closely spaced on steep slopes.
- Evenly spaced contour lines indicate a uniform slope.
Index Contours and Intermediate Contours
- To simplify the map, contour lines may be thickened at regular intervals (e.g., every 100 meters).
- These thickened lines are called Index Contours.
- Thinner lines between index contours are called Intermediate Contour Lines.
Interpretation of Contour Maps
- A contour line that closes within the limits of the map indicates a hill, plateau, or ridge.
- Topographical maps (or contour maps) show elevation (height above or below sea level) and shape of land using contour lines.
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Description
Learn about contour maps, contour lines, and their features. Understand how to read contour lines, interpret elevation, and identify land shapes.
