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Foundation ::
Visualization and Virtual Reality ::
Contour Plot Algorithm
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Contour Plot Algorithm
A General Algorithm for the Construction of Contour Plots
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Moderators:
Adopt This Application!
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SOURCE CODE AVAILABLE
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The graphical presentation of experimentally or theoretically generated
data sets frequently involves the construction of contour plots. A
general computer algorithm has been developed for the construction of contour
plots. The Contour Plot Algorithm provides for efficient and accurate contouring
with a modular approach which allows flexibility in modifying the algorithm
for special applications.
The algorithm accepts as input data values at a
set of points irregularly distributed over a plane. The algorithm is based
on an interpolation scheme in which the points in the plane are connected by
straight line segments to form a set of triangles.
In general, the data is
smoothed using a least-squares-error fit of the data to a bivariate polynomial.
To construct the contours, interpolation along the edges of the triangles
is performed, using the bivariable polynomial if data smoothing was
performed. Once the contour points have been located, the contour may be
drawn.
Contour Plot Algorithm carries the NASA case number ARC-11441. It was originally released as part of the NASA COSMIC collection.
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