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Index contours can be identified by every 5th contour line and also because its darker and heavier
Index Contours
I think it's an index contour, but I'm not sure.
Index contours
Two successive index contours on a map would be 5 meters apart. The interval is how far apart two contour lines are, so since the contour interval is 5 meters the answer is 5 meters.
Each index contour has an elevation associated with it. When you look at 2 contours, one will have a higher corresponding elevation. As you go from the lower elevation to the higher elevation, you know that the land is increasing in the direction toward the higher elevation. From the higher to the lower elevation, the land is decreasing (sloping downward, decreasing in elevation).
The Contours ended in 1968.
The Contours was created in 1959.
The lines on a topographical map show the contours of the land.
A topographic map would show elevations and contours.
Contours can intersect if you have an overhang. If there is a vertical drop, the contours will touch but not cross one another.
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