Fivemile Valley, Utah - 7.5 Minute Series Topo Map Mining History Books • Meridian lines on vial

• Meridian lines on vial assist during pre-trip planning when aligning with map grid lines

Field Trip Guides

000 Size: 27" x 40"

the right page is part of a US Geological Survey topographic map

It is situated in the Castle Valley

Fivemile Valley, Utah - 7.5 Minute Series Topo Map Mining History Books • Meridian lines on vialThe 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