Grouse Creek, Utah - 30x60 Minute USGS Topographic Map Canyoneering hints on picking the right

hints on picking the right spot for the time you can spend

Complemented by full-color photos

the vast Great Plains

Giraud and L

Wilcox and B

Grouse Creek, Utah - 30x60 Minute USGS Topographic Map Canyoneering hints on picking the rightThe 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