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.[1] It is a cross-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.[2] A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes.[3] The contour interval of a contour map is the difference in elevation between successive contour lines.[4]
More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. 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.
Contour lines are curved, straight or a mixture of both lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on a visible three-dimensional model of the surface, as when a photogrammetrist viewing a stereo-model plots elevation contours, or interpolated from estimated surface elevations, as when a computer program threads contours through a network of observation points of area centroids. In the latter case, the method ofinterpolation affects the reliability of individual isolines and their portrayal of slope, pits and peaks.<span>[5]</span>
That a couple could only have one child unless their child died. Forced abortions are mandatory for anyone who gets pregnant after having more than one child
Mid-ocean ridge volcanoes form where two plates are moving apart as the plates move apart cracks form in the crust Magma from the mantle surges up these cracks and erupt unto the surface forming new crust
I would get every one to look around the school to find things for the night to stay warm and be able to go to sleep and then get a team of people.
that would cook the dinners for the ones who can’t cook and get a team of people that will clean classrooms and a team of students that will clean the hall ways and some that will clean the Toilets
so that there is a System that way every one can live until the food runs out until we find the way out there will be a routine