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  2. Topographic map - Wikipedia

    en.wikipedia.org/wiki/Topographic_map

    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.

  3. Contour line - Wikipedia

    en.wikipedia.org/wiki/Contour_line

    More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level.

  4. Contour plowing - Wikipedia

    en.wikipedia.org/wiki/Contour_plowing

    Contour plowing. Contour bunding or contour farming or contour ploughing is the farming practice of plowing and/or planting across a slope following its elevation contour lines. These contour lines create a water break which reduces the formation of rills and gullies during times of heavy precipitation, allowing more time for the water to ...

  5. Nautical chart - Wikipedia

    en.wikipedia.org/wiki/Nautical_chart

    A nautical chart or hydrographic chart is a graphic representation of a sea region or water body and adjacent coasts or banks. Depending on the scale of the chart, it may show depths of water ( bathymetry) and heights of land ( topography ), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and ...

  6. Lake Murray (South Carolina) - Wikipedia

    en.wikipedia.org/wiki/Lake_Murray_(South_Carolina)

    Lake Murray is a reservoir in the U.S. state of South Carolina. It is approximately 50,000 acres (20,000 hectares) in size, and has roughly 650 mi (1,050 kilometres) of shoreline. It was impounded in the late 1920s to provide hydroelectric power to the state of South Carolina. Lake Murray is fed by the Saluda River, which flows from upstate ...

  7. Contour integration - Wikipedia

    en.wikipedia.org/wiki/Contour_integration

    One use for contour integrals is the evaluation of integrals along the real line that are not readily found by using only real variable methods. [5] Contour integration methods include: direct integration of a complex -valued function along a curve in the complex plane; application of the Cauchy integral formula; and.