write the factors assesses by contour line
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Scale of the map. The contour interval is kept inversely proportional to the scale of the map. ...
Purpose of the map. The contour interval on a map also depends upon the purpose for which the map is to be utilized. ...
Nature of the ground. ...
Availability of time and funds.
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A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value.[1][2] It is a plane section of the three-dimensional graph of the function f(x, y) parallel to the (x, y)-plane. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level.A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.The contour interval of a contour map is the difference in elevation between successive contour lines.
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