MCIC Land Navigation Practice Test

What is the general purpose of contour lines on a topographic map?

They show weather patterns They show political boundaries They depict elevation and shape of terrain They show color shading

Correct Answer:

They depict elevation and shape of terrain

Explanation:

Contour lines are the way a topographic map shows elevation and the shape of the land in three dimensions on a flat surface. Each line connects all points at the same height above sea level, so the pattern of lines reveals how the terrain rises and falls. Close lines indicate steep slopes, while lines spaced farther apart show gentler slopes. Closed loops depict hills or depressions, and the orientation of V-shaped patterns often points uphill along streams, helping you read valleys and ridges. Weather patterns, political boundaries, or color shading serve other mapping purposes, but contour lines specifically communicate elevation and the terrain’s form.

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