Wolf Creek Summit, Utah - 7.5 Minute Series Topo Map Material:Polypropylene This isn't merely a navigational

This isn't merely a navigational tool

The Hastings lens consists of three separate lenses made of different types of glass

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including discussion of the inhabitants' daily activities

This map represents the geology of the Ophir quadrangle at 1:24

Wolf Creek Summit, Utah - 7.5 Minute Series Topo Map Material:Polypropylene This isn't merely a navigationalThe 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