con tour map

contour map

noun
a topographic map on which the shape of the land surface is shown by contour lines, the relative spacing of the lines indicating the relative slope of the surface.

Origin:
1860–65

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
contour map  
A map that shows elevations above sea level and surface features of the land by means of contour lines.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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