a map that shows the surface features or topography of the Earths surface
height of an object above sea level
A line on a topographic map that connects points of equal elevation
A federal government agency that makes the topographic maps for the United States
the difference in elevation from one contour line to the next
the difference in elevation between the highest and lowest parts of an area
A darker, heavier contour line that is usually every fifth line and that is labeled by elevation.