Question

Study the topography map.

A topographic map of Mount Rainer. The line with number 13,600 is thicker than surrounding lines.

What does the line at 13600 represent?

scale bar
index contour
elevation difference
topographic symbol

Answer 1

The line at 13,600 represents an **index contour**. Index contours are typically thicker lines on a topographic map and indicate elevation at specific intervals, helping to easily identify the elevation of the terrain. In this case, the line at 13,600 feet would show the elevation at that level.