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A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. [4] The contour interval of a contour map is the difference in elevation between successive contour lines.
Topographic maps are also commonly called contour maps or topo maps. In the United States, where the primary national series is organized by a strict 7.5-minute grid, they are often called or quads or quadrangles. Topographic maps conventionally show topography, or land contours, by means of contour lines.
A topographic map of Stowe, Vermont with contour lines This false-color satellite image illustrates topography of the urban core of the New York metropolitan area, with Manhattan at its center. Topography is the study of the forms and features of land surfaces .
Isarithmic maps, also known as contour maps or isoline maps, depict continuous quantitative fields (sometimes conceptualized as "statistical surfaces" by cartographers), such as precipitation or elevation by partitioning space into regions, each containing a consistent range of values of the field.
USGS topographic map of Stowe, Vermont with contour lines at 20-foot intervals. Terrain cartography or relief mapping is the depiction of the shape of the surface of the Earth on a map, using one or more of several techniques that have been developed.
A spur in the Tatra Mountains. A spur is a lateral ridge or tongue of land descending from a hill, mountain or main crest of a ridge. [1] [2] It can also be defined as another hill or mountain range which projects in a lateral direction from a main hill or mountain range.
Isopachs are contour lines of equal thickness over an area. Isopach maps are utilized in hydrographic survey, stratigraphy, sedimentology, structural geology, petroleum geology and volcanology. An isopach map is similar to an isochore map, but these terms actually describe different methods of displaying thickness variations within a layer. [1] [2]
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