Black Lake, Idaho - 7.5 Minute Series Topo Map Bonneville Shoreline Trail Smith River National Recreation Area

Smith River National Recreation Area

it has 80 color plates

and Allessandro Zanazzi

Road and Mule Canyons WSA and Glen Canyon National Recreation Area

and the Death Valley flow system

Black Lake, Idaho - 7.5 Minute Series Topo Map Bonneville Shoreline Trail Smith River National Recreation AreaThe distinctive characteristic of a topographic map is that the shape of the Earth's surface is shown by contour lines. Contours are imaginary lines that join points of equal elevation on the surface of the land above or below a reference surface, such as mean sea level. Contours make it possible to measure the height of mountains, depths of the ocean bottom, and steepness of slopes. A topographic map shows more than contours. The map also includes