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GeographyMapping Unknown Lands
How Do We All Get Around?
Indian Spatial Concepts
 

Elevation



his map uses conventional contour line symbols to indicate elevation above sea level (note the numbers on some of the lines). A contour line is an "isoline," connecting points of equal value. Elevations are also given as fixed points: the elevation of Swan Lake Valley is 4270 feet above sea level.

--John Logan Allen

How Do We All Get Around?
Indian Spatial Concepts


 
From Discovering Lewis & Clark ®, http://www.lewis-clark.org © 1998-2014
by The Lewis and Clark Fort Mandan Foundation, Washburn, North Dakota.
Journal excerpts are from The Journals of the Lewis and Clark Expedition, edited by Gary E. Moulton
13 vols. (Lincoln: University of Nebraska Press, 1983-2001)