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A three-dimensional surface, whose contour graph is below. A two-dimensional contour graph of the three-dimensional surface in the above picture. A contour line (also isoline, isopleth, isoquant 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.
Comet plot : A two- or three-dimensional animated plot in which the data points are traced on the screen. Contour plot : A two-dimensional plot which shows the one-dimensional curves, called contour lines on which the plotted quantity q is a constant. Optionally, the plotted values can be color-coded.
For example, a city (a two-dimensional region) may be represented as a point, or a road (a three-dimensional structure) may be represented as a line. As long as the user is aware that the latter is a representation choice and a road is not really a line, this generalization can be useful for applications such as transport network analysis .
The boundary of a cross-section in three-dimensional space that is parallel to two of the axes, that is, parallel to the plane determined by these axes, is sometimes referred to as a contour line; for example, if a plane cuts through mountains of a raised-relief map parallel to the ground, the result is a contour line in two-dimensional space ...
For example, a triangular mesh may represent a 2D data surface embedded in 3D space, where spatial positions of the vertices and interpolated points along a contour will all have 3 coordinates. Note that the case of squares is ambiguous again, because a quadrilateral embedded in 3-dimensional space is not necessarily planar, so there is a ...
Objects of this type are often represented as a contour map that gives the height (i.e., thickness or depth) of the object at each point. [1] A 2.5D image is a simplified three-dimensional ((x, y, z) Cartesian coordinates system) surface representation that contains at most one depth (z) value for every point in the (x, y) plane. All features ...
Associated with three-dimensional (,,) data and topography, TINs are useful for the description and analysis of general horizontal (,) distributions and relationships. Digital TIN data structures are used in a variety of applications, including geographic information systems (GIS), and computer aided design (CAD) for the visual ...
A section, or cross-section, is a view of a 3-dimensional object from the position of a plane through the object. A section is a common method of depicting the internal arrangement of a 3-dimensional object in two dimensions. It is often used in technical drawing and is traditionally crosshatched. The style of crosshatching often indicates the ...