Tag Archive for Tag: Contours

Tag: Contours Levelling

Levelling is the process of finding the height of a new point or points by comparison with that of an existing point which has been selected as a datum or whose height is already known with respect to some other datum. If the points are close to each other and only their relative heights are needed, the simplest procedure is

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Tag: Contours Contours

A contour line is a imaginary line which connects points of equal elevation. Such lines are drawn on the plan of an area after establishing reduced levels of several points in the area. The contour lines in an area are drawn keeping difference in elevation of between two consecutive lines constant. For example, Fig. 17.1 shows contours in an area with contour interval

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