For example, the difference between 500 feet and 600 feet is 100 feet.
#Contour interval calculator plus
Calculate the contour interval by dividing the change in elevation between the two index contours by the number of contour lines plus one. For example, there may be four contour lines between two index contours.Ĥ. Do not include the index contours themselves. Count the number of contour lines between these same two index contours. For example, the index contours may have elevations of 500 feet and 600 feet respectively.ģ. Write down the elevations of two consecutive index contours. The line thickness for an index contour is greater than normal adjacent contour lines.Ģ. These contour lines have their elevation marked at various points. The contour interval is the difference in elevation between two side-by-side contour lines.ġ. One aspect of this process is calculating a contour interval. High school earth science students learn to read and interpret topographic maps. Every point on a contour line has the same elevation. These lines connect various points of equal elevation with one smooth line. A topographic map identifies varying land elevations with contour lines. Military personnel, scientists, hikers, surveyors and others use these maps for varying purposes. The darker contour lines on this map are index contours.Ī topographic map shows a graphical representation of the shape and location of physical features of land and other physical entities.
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