9/18/2023 0 Comments Topographic map contour interval![]() ![]() Pending cliffs can have one line crossing over the additional (this is the just time those lines can cross), with the one line appearing as dotted.īe familiar, however, that smaller cliffs can happen between the contour lines, even in areas with smooth slopes.Ī cliff 15 feet elevated, for instance, along a flow channel or due to slight faults, would not certainly indicate whether that cliff lies between two contour lines, particularly if they have a higher contour gap. If the relief is a vertical cliff, the contour lines nearly come together and can glance as if they are merging. Reading the contour lines Where the contour lines get extremely close, an almost precipice happens. The near the contour lines arrive, the additional inclined the terrain will be. ![]() The farther the contour lines arrive on the map, the smoother the slope of the earth is. The contour lines never cross, as a point on the map cannot possess two different heights at a similar time. A single contour line denotes an equal elevation line, which indicates that if the contour line computes an elevation of 1000 feet above average sea level, every point along that line is 1000 feet above average sea level. The Contour Lines indicate the shape of the earth. The horizontal distance between two points on two consecutive contour lines for a provided slope is known as the horizontal equivalent.As intervals are for the computation of the vertical elevation of an area, a similar way to compute the horizontal distance is termed Horizontal Equivalent.Earthquake estimation for the dam, bridge, or road can be found with the help of contour intervals within the map.To find the height of the intermediate point, the interval is utilized.In a larger map, index contour lines are much less to maintain the map and are simple to learn.A higher interval is utilized for a larger area and smaller intervals for a smaller area.Interval is utilized when a large space is to be mapped to a small piece of paper.The uses of contour interval in surveying are as follows, The number of lines acquired in the above step is 4 and added with 1.Now count the number of non-index lines contour lines between 70 as 4.The difference between the two selected index contour lines 71 is 7100 – 7000 = 100.Let’s assume two index contour lines, 70, and compute the interval between them.Considering the above map for the calculation of intervals, the steps involved in contour interval computation.Step 5:-The last step is the quotient of the difference between two index lines (step 2) and the number of lines between two index lines plus 1 (step 5). For Example: If the number of lines between two index lines is 5. Step 4:-The number of lines acquired in the above step is obtained and added with 1. Step 3:-Directly count the number of non-index line contour lines between the two index contour lines specified for the contour interval computing in the 1st step. To obtain the difference, subtract the higher elevated line from the lower elevated line reading. Step 2:-Now compute the difference between the two selected index contour lines established from a map. Step 1:-First of all, locate two index contour lines that are named with a particular elevation. The computation of the contour intervals is as below, In the above picture, the dark lines with reading are index contour lines. These marked or tagged lines are remembered or termed index contour Lines. To maintain the contour map easy and understandable to read, not every contour line is marked with its elevation reading. Locate the difference between the two elevations.Ī contour map contains contour lines of a given geographical region. The biggest number indicates the uphill rise. Discover the elevations of two adjacent index lines. These index lines will be noted with their elevation. On most of the maps, each fifth contour line, indicated as a heavier or darker line, is an index line or index contour. Understanding how to compute the interval becomes a valuable skill. It refers to the vertical distance or difference in elevation between two successive contour lines on a map or a topographic profile.Ī map legend usually specifies the contour interval on the map, but sometimes just a portion of a map is available. What Is Contour Interval? Contour IntervalsĬontour interval is an important concept in cartography, geography, and topography. How can I use contour intervals to determine the slope of a hill or mountain?.What do closed contour lines represent on a topographic map?.How is the contour interval determined?.Factors Affecting The Selection Of Interval.What Is the Importance Of Topographic Maps?.How To Calculate Contour Interval On Maps.10×10 Room Construction Cost Excel Sheet.Construction Material Testing Menu Toggle.30×40 House Plans | 1200 sq ft House Plan.20*50 House Plan | 1000 sq ft House Plan. ![]()
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