Question

What is an Index contour​

Answer 1

Answer:

Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

Explanation:

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Answer 2

Explanation:

index contours are bold are thicker lines that appear at every fifth contour line if the number associated with specific contour lines are increasing the elevation of the terrain is also increasing