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What is the purpose of contour lines on a topographical map?
What is the purpose of contour lines on a topographical map?
- To show the shape of the land at sea level
- To mark the location of rivers and lakes
- To indicate the elevation of land, steepness of slope and shape of land at various heights (correct)
- To show the direction of water flow
What do the numbers on contour lines indicate?
What do the numbers on contour lines indicate?
- The direction of the slope
- The type of land cover
- The distance between two points
- The height above sea level (correct)
What is the significance of thickened contour lines on a map?
What is the significance of thickened contour lines on a map?
- They show the location of buildings
- They indicate a change in land use
- They mark the location of roads
- They are used to simplify the map by highlighting elevation at regular intervals (correct)
What does a contour line that closes within the limits of the map indicate?
What does a contour line that closes within the limits of the map indicate?
Why are contour lines more closely spaced on steep slopes?
Why are contour lines more closely spaced on steep slopes?
What is the purpose of Intermediate Contour Lines?
What is the purpose of Intermediate Contour Lines?
What do contour lines show about the shape of land?
What do contour lines show about the shape of land?
What is the main purpose of a contour map?
What is the main purpose of a contour map?
Why are contour lines numbered?
Why are contour lines numbered?
What do closely spaced contour lines indicate?
What do closely spaced contour lines indicate?
What is the purpose of Index Contours?
What is the purpose of Index Contours?
What does a contour line that does not close within the limits of the map indicate?
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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