What is contour value of mean sea level
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Answer:
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. ... The contour interval of a contour map is the difference in elevation between successive contour lines.
Explanation:
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Answer:
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.[3] 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.[4] The contour interval of a contour map is the difference in elevation between successive contour lines.[5]
More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value.[2]
The gradient of the function is always perpendicular to the contour lines. When the lines are close together the magnitude of the gradient is large: the variation is steep. A level set is a generalization of a contour line for functions of any number of variables.
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