What does the spacing between contour lines reveal about the terrain?

The spacing between contour lines on a topographic map is a critical visual indicator of the slope of the land. When contour lines are close together, it signifies a steep slope; this means that the elevation changes rapidly over a short horizontal distance. Conversely, when the contour lines are farther apart, it indicates a gentler slope, suggesting that the elevation changes more gradually.

Understanding this relationship is essential for interpreting topographic maps and assessing terrain features. Steep terrains can impact various activities, such as construction, agriculture, and hiking, by influencing drainage patterns, soil erosion rates, and accessibility. Consequently, the analysis of contour line spacing is crucial for effective land-use planning and environmental management.