Topographic Map
http://www.mapwatch.com/gallery/topographic-maps.shtml
A Topographic map is a type of map characterized by a large scale detail and quantitative representation of relief, usually using contour lines in modern mapping, but historically using a variety of methods. This map was produced by the United States Geological Survey and illustrates the community of Northeast, Maryland which is located along the shorelines of the Chesapeake Bay. The brown lines on this map are contour lines and they trace points of equal elevation across the map.
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