Contour lines on a site plan indicate what?

Contour lines on a site plan indicate what?

• A. Land ownership boundaries
• B. They indicate slope direction only
• C. Property setbacks
• D. Elevation differences between points

Answer: (D)

Contour lines map elevation on a site by connecting points of equal height. Each line represents a specific elevation, so the overall pattern shows how the land rises and falls across the area. The key idea is that these lines reveal elevation differences between points. How steep the slope is becomes clear from the spacing: lines that are close together indicate a steep slope, while lines that are farther apart show a gentler slope. This information helps with grading, drainage planning, and figuring where high and low points are on the site. Contour lines do not depict land ownership boundaries or property setbacks, which come from parcel maps and zoning rules. They also don’t simply indicate slope direction; the direction of slope is perpendicular to the contour lines, and the elevation changes as you move across them.

Contour lines map elevation on a site by connecting points of equal height. Each line represents a specific elevation, so the overall pattern shows how the land rises and falls across the area. The key idea is that these lines reveal elevation differences between points. How steep the slope is becomes clear from the spacing: lines that are close together indicate a steep slope, while lines that are farther apart show a gentler slope. This information helps with grading, drainage planning, and figuring where high and low points are on the site. Contour lines do not depict land ownership boundaries or property setbacks, which come from parcel maps and zoning rules. They also don’t simply indicate slope direction; the direction of slope is perpendicular to the contour lines, and the elevation changes as you move across them.