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Contour Extraction and Visulization from Topographic Maps
Topographic maps offer a rich selection of data on the surface of the Earth, ranging from terrain type to land features, both natural and man-made. Perhaps one of the most ubiqui-tous features on topographic maps is the presence of contour lines to represent elevation data. These contour lines are often...
Topographic Mapping booklet - USGS
Maps of various kinds—road maps, political maps, land use maps, maps of the world—serve many different purposes. One of the most widely used of all maps is the topographic map. The feature that most distinguishes topographic maps from maps of other types is the use of contour lines to portray the shape and elevation of the land....
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