![]() ![]() Instead, these lines are continuous, although they can continue off the edge of the map. : the vertical distance between the elevations represented by adjacent contour lines on a map Love words You must there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. 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. The height of the land rises as the numbers linked with certain contour lines rise. Every sixth contour line has an index contour, which is a bolder or thicker line. ![]() You can of course highlight 10m contours on an interval of 2 (every fifth) or 5 (every other). If its 5, each line represents 5 vertical feet of change between lines. You cant have 10, 5, 2 unless you have different sets of contours. 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). The vertical distance or difference in elevation between contour lines is known as a contour interval. Contour interval is a single number that defines the number of vertical units between contours. 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. Remember to use the contour lines to determine the elevations, and the bar scale on your map to measure the distance. (Hint: There are 5280 feet in one mile.\)), but other units are also used. If a map has a scale of 1:10,000, how many real inches does one inch on the map represent? Show your work and include all units for full credit. What is the difference in elevation between index contours A. In the valley, use a blue pencil to indicate direction water is flowing. The contour interval of a topographic map is 25 feet, and every fifth line is an index contour. (from, recommended at top of assignment) In the space below, draw a simple contour map showing a valley. As a rule of thumb, the V-shaped contour is pointing upstream (the opposite direction from the flow of a stream or river). All rivers flow downhill from higher to the lower elevations, perpendicular to the contour line above it. Mark four points (two on the endpoints, and two between) and draw the contours. Divide 300 feet by 3 to get one contour every 100 feet. d 300 feet There are to be three contour lines on this interval. You know that you're looking at a valley bottom when contour lines are V or U-shaped. Contour Map Generation Example: Contours are to be placed every ten feet. The rule of V and U-shaped valleys: Valleys are elongated low-lying depressions usually with a river flowing through it. What is the total relief (highest elevation minus lowest elevation) of this feature? Include units.ġ0. What is the name of the feature shown in the topographic map below? 50 40 30 20 10 9. Contour Interval Definition: A contour interval is a vertical height or a difference in elevation between contour lines in a topographic map. Draw your profile on the graph included below. Using the same map, construct a cross section (also called a topographic profile) along line X-Y. What is the contour interval of the map shown below? 50 20 30 40 (Elevations shown in Feet) 8. What is the contour interval of Map C feet feet feet Map C Map A Map B 20 7400- 800 1350 Y 1300 00901) -7250 -7200 10800 -10600 Z150 100 -7050 4. ![]()
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