![]() Where the contour lines get very close, and almost precipice occurs. The closer the contour lines appear, the more inclined the terrain will be. The contour lines never cross, as a point on the map cannot have two different elevations at the same time. The farther the contour lines appear on the map, the smoother the slope of the earth is. A single contour line marks an equal elevation line, which means that if the contour line measures an elevation of 1,000 feet above average sea level, all points along that line are 1,000 feet above average sea level. The contour lines show the shape of the earth. What Is Modulus of Rupture | What Is Flexural Modulus | What Is Flexural Stress | Flexural Strength of Concrete | Bending Modulus | What Is Flexural Strength.How to Calculate Staircase Qty | Concrete & Bar Bending Schedule (BBS) for Staircase | Staircase Reinforcement Details.What Is Staircase | Staircase Design Calculation Example | Concrete Calculation of Staircase.What Is A Concrete Pump | How Does A Concrete Pump Work.What is Tremie Pipe | Tremie Method of Underwater Concrete.What to Do If the Concrete Cube Fails After 28 Days?.Since the contour intervals are for calculating the vertical elevation of an area, in the same way as for calculating the horizontal distance, it is referred to as the horizontal equivalent. Earthwork estimates for any type of structure, such as bridges, dams or roads, can be found with the help of contour intervals on a map. A higher contour interval is used for a large area and a small contour interval for a small area. When a large area is to be mapped onto a small piece of paper, contour intervals are used. If, on the other hand, the elevation difference between the index lines were 100 feet, the contour interval would be 100 / 5 = 20 or a 20-unit contour interval.Īlso, read: Principle of Plane Table Surveying Methods | Equipment | Error | Advantage | Limitation Uses of Contour Intervals in Surveying.The contour interval is equal to 200 / 5 = 40,.In the example above, the distance 200 is divided by the number of lines, 5.Divide the difference in elevation between the index lines by the number of contour lines from one index line to the next.To find the elevation interval between the contour lines,.Counting each contour line up to and including the next index line.Start with the next line of the index line,.As with counting from one number to the next,.To Knowing how to calculate the contour interval becomes a useful skill.l, start by counting the contour lines from one index line to the next index line. Maps generally count five contour lines from one index line to the next, including the next index line. If the uphill elevation is equal to 1,000 above average sea level and the lowest elevation is equal to 800 above average sea level, the difference in elevation is equal to 200. Index contours are bold or thicker lines that appear at every fifth contour line. What Is a Contour Interval on a Topographic Map?Ī contour interval is a vertical distance or difference in elevation between contour lines.How Do You Measure the Height of Land on a Map?.How Do You Find the Height of a Contour Line?.What Are Four Main Uses of Topographic Maps?.What Is an Important Part of a Topographic Map?.What Is the Contour Interval Used on This Map?.What Are the Uses of Contour in Surveying?.What Is Meant by the Term Contour Interval?.What Is the Contour Interval on the Map?.What Are Index Contour Lines on a Topographic Map?.Where Is the Contour Interval on a Map?.How Do You Find the Contour Interval on a Map?.How Much Is the Contour Interval on a Topo Sheet?.How Do You Read Contour Intervals on a Topographic Map?.What Is Contour Interval on a Topographic Map?.What Is the Factors Affecting Contour Interval?.What Is the Difference Between Contour Interval and Scale?.What Is the Purpose of Contour Interval?.What is the Contour Interval of the Map?.What Is the Importance of Topographic Maps?.How to Calculate the Contour Interval of the Maps?.
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