Topographic contours are shown in brown by lines of different widths. The predictions are influenced by many factors. These maps are used for a number of applications, from camping, hunting, fishing, and hiking to urban planning, resource management, and surveying. Many features are identified by labels, such as Substation or Golf Course. Tide tables can be used for any given locale to find the predicted times and amplitude (or tidal range). Instead, these lines are continuous, although they can continue off the edge of the map. A topographic map is a detailed and accurate two-dimensional representation of natural and human-made features on the Earths surface.
In addition to obeying the set contour interval for a map, contour lines should never branch (split) or simply end inside of the mapped region. Benchmark locations will normally be found in the area between contour lines. For example, a benchmark of 236ft will be found somewhere between the 230ft and 240ft contour line (if the contour interval is 10ft), or between the 235ft and 240ft contour line (if the contour interval is 5ft). These benchmarks are rarely located on a contour line and instead are usually identified by a black “x” or identified with the letters “BM” and with the elevations included in black numbers (as opposed to the brown numbers on index contours). These surveyed points are exact elevations above sea level and are commonly used to mark the elevations of mountains, hilltops, road intersections, and airport runways. In addition to contour lines, topographic maps will also have benchmarks (actual surveyed points) in various locations on your map. Topographic mapshave a variety ofuses, from planning the best route for hike to determining a location for aschool or an airport. Abstract Tidal flats, which are both a natural ecosystem and a type of landscape, are of significant importance to ecosystem function and land resource potential. Contour lines, sometimes called 'levellines,' join points of equal elevation.The closer together the contour linesappear on a topographic map, thesteeper the slope (assuming constantcontour intervals).
The resulting digital elevation model had a height accuracy of better than 20 cm. Remember to use the contour lines to determine the elevations, and the bar scale on your map to measure the distance. A topographical map of the tidal flats of the Radial Sand Ridges was created.
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