What do contour lines on a plat indicate?

Contour lines on a plat represent a series of connected points that share the same elevation above a baseline, usually sea level. This essential feature of topographical maps allows for a visual representation of the landscape's shape and slope. By showing how elevation changes over an area, contour lines help surveyors, engineers, and planners understand the terrain's features, such as hills, valleys, slopes, and flat areas. The spacing between these lines can also indicate the steepness of the terrain; closely spaced lines suggest a steep incline, while lines that are farther apart indicate a gradual slope.

Understanding contour lines is crucial for various applications, including land development, environmental planning, and construction, as these lines provide foundational data necessary for making informed decisions related to land use and management.