What do contour lines on a map help indicate?

Contour lines on a map are essential for indicating the level of detail on landforms. They represent the elevation of the terrain and demonstrate the shape and steepness of the land. As the contour lines are drawn at regular intervals, they allow users to visualize how steep or gradual a slope is. Closely spaced contour lines indicate a steep incline, while widely spaced lines suggest a more gentle slope. This information is crucial for navigation, planning hikes, or understanding the geographical features of an area.

In addition to conveying detailed information about elevation changes, contour lines help delineate landforms such as hills, valleys, ridges, and depressions, thus enhancing the map's usability for various outdoor activities and strategic planning.