A topographic survey is typically based upon a systematic observation and published as a map series, made up of two or more map sheets that combine to form the whole map. Traditional definitions require a topographic map to show both natural and artificial features. In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but historically using a variety of methods. Section of topographical map of Nablus area ( West Bank) with contour lines at 100-meter intervals. A topographic map of Stowe, Vermont with contour lines Part of the same map in a perspective shaded relief view illustrating how the contour lines follow the terrain Sheet #535 (2013 version second digital edition) of MTN50 Spanish National Topographic map series, covering Algete town (near Madrid) and its surroundings.
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