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Examples of contour interval1/23/2024 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.
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