What do contour lines indicate?

Contour lines are a key feature on topographic maps, and they represent the elevation of the terrain directly under the lines. Each line connects points of equal elevation, which means that wherever you find a contour line, you are looking at a specific height above sea level. The spacing of these lines also carries significant information. When contour lines are close together, it indicates a steep slope because the elevation changes quickly over a short horizontal distance. In contrast, when the lines are spaced farther apart, it signals a gentle slope where elevation changes gradually.

This understanding of contour lines is essential for various navigation and land management activities, including search and rescue operations, as it allows teams to assess terrain features and plan routes effectively. Being able to interpret contour lines aids SAR personnel in understanding the landscape's challenges, influences strategies for search areas, and helps ensure the safety of operations in various terrains.