Cave Flat, Utah - 7.5 Minute Series Topo Map Green River Formation From the Isthmus of Panama

From the Isthmus of Panama to the southern reaches of Cape Horn

best view hikes

and the intrigues of the real Las Vegas

 Desert Life spotlights more than 80 species of plants and animals

Cave Flat, Utah - 7.5 Minute Series Topo Map Green River Formation From the Isthmus of PanamaThe 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