What is a topographic map? When would you use a topographic map?

Watch the following slideshow to get an introduction to topographic maps.

Video segment. Assistance may be required.
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A topographic map is a map that shows surface features, or topography, of the Earth. Topographic maps show both natural features, such as rivers, lakes, and mountains, and man-made features, such as cities, roads, and bridges. Topographic maps also show elevation.