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Aug 28, 2023 · Contour mapping is a technique used in cartography and geography to represent the three-dimensional shape and elevation of the Earth's surface on a two-dimensional map. Contour maps display lines called "contour lines" that connect points of equal elevation above a reference datum, typically mean sea level. These lines help visualize the topography and relief of a region, making it easier to ...
Oct 23, 2024 · Explain to students that details such as color and texture (contour maps) can be added to maps to help convey topography, the physical features of Earth, as well as bathymetry, the underwater surface structures hidden from the naked eye. NASA scientists use topographic maps to better understand features on Earth, our Moon, and many celestial bodies in our solar system.
Topographic contour maps of Mars are compiled by the synthesis of data acquired from various scientific experiments of the Mariner 9 mission, including S-band radio-occulation, the ultraviolet spectrometer (UVS), the infrared radiometer (IRR), the infrared interferometer spectrometer (IRIS) and television imagery, as well as Earth-based radar information collected at Goldstone, Haystack, and Areci
- S.S.C. Wu
- 1978
- Article
- Mars synthetic topographic mapping
In Figure 6.11, the upper part shows a topographic map of a hill that contains two separate hill tops, and the bottom picture shows a topographic profile representing the profile along the line A-B on the map. Notice that the topographic profile contains horizontal elevation lines at the same intervals as the contour lines on the topographic map.
On a weather map the iso-lines might be isobars and represent lines of constant air pressure, or isotherms, which are lines of constant temperature. Figure 1 gives a simple example. Pretend you are flying above a hill and looking straight down. Each number represents the elevation in meters at a specific point on the earth’s surface. The
On a topographic map, a river is shown crossing from Point A in the northwest to Point B in the southeast. Point A is on a contour line of 800 ft and Point B is on a contour line of 900 ft. In which direction does the river flow? On a topographic map, six contour lines span a horizontal map distance of 0.5 inches.
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A topographic map is a type of map that adds a vertical dimension to an otherwise two-dimensional map defined by the north, south, east, and west compass directions. This third dimension on a topographic map is represented by contour lines , which represent a constant elevations above either sea level (either average sea level (a.s.l.) or mean sea level (m.s.l.)).
