Lance Creek, Wyoming - 30x60 Minute USGS Topographic Map Women Authors Bert Loper

Bert Loper

turning the average walk in the woods into an exciting wilderness adventure

The reflections of the Tetons gently ripple across the river's serene water

National Geographic's Classic style political map of France

or experience a night at the theater or opera that will rival New York

Lance Creek, Wyoming - 30x60 Minute USGS Topographic Map Women Authors Bert LoperThe 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