Level Lines and Surfaces

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(also contour lines and surfaces), sets of points at which the function u(P) of point P of a plane or three-dimensional space assumes constant values. The equation u(P) = const in a two-dimensional domain defines a level line; in a three-dimensional domain it defines a level surface. Level lines and surfaces are used extensively to represent functions in meteorology, such as isotherms and isobars, and in geodesy and topography. Level lines and surfaces degenerate into points at the extrema of the function u(p). The gradient of the function u(P) is perpendicular to the level line or surface at the corresponding point.

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No references found			Levchenko, Mitrofan Levchenko, Mitrofan Vasilevich Levchuk, Timofei Levchuk, Timofei Vasilevich levecel leveche Levee Leveille, Gilbert A. Level level 1 cache level 2 cache Level 3 level above threshold level bombing level compensator level control level converter level crosscut level crossing Level Divide Vegetation level drive level error level fold Level Gage level indicator Level Lines and Surfaces level measurement level of abstraction level of burst level of free convection Level of Jurisdiction level of nondivergence level of saturation level of significance level off level one cache level point Level Rod level scheme Level Sensor level set Level Shift level shifting level surface Level Tester level transit level two cache level valve Level Width level-off position level-sensitive scan design			Level curve Level curves Level debt service Level Dependent Frequency Response Level Dependent Signal Flow level descriptor Level Discrete Set Level Divide Vegetation level down level down level down level down level down level down level drive Level Electrical Transmitter level error level fold Level Gage Level Gauge Level Green Recording Company Level hypersurface Level I Level I Environmental Site Assessment Level Indicator Level Indicator Level Indicator Controller Level junction Level line Level line Level Lines and Surfaces Level load Level Load Fund Level Load Funds Level Loads Level measurement Level Not Determined Level of abstraction Level of abstraction Level of Acculturation level of activities Level of Adversary Effort Level of Assessment level of attainment level of attendance Level Of Authority Level of Awareness level of burst Level of Care Level of Care Level of Care Utilization System Level of Community Support Systems Level Of Concern level of confidence level of consciousness level of consciousness level of consciousness level of consciousness Level of detail Level of detail Level of Detail (Programming)

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