The Contour Graph or series is used to represent a set of three-dimensional data as
lines. It has three mandatory series
Depth and Value. The data in the Position and Depth components
must form a 2D rectangular grid on the xz plane. Each
contour line comprises points having the same elevation value in the Value component.
If the UseGradient property is set to true, the contour lines will be
colored using a color gradient. The color gradient is formed using the StartColor, MidColor,
and EndColor properties that respectively controls the start, middle, and
end colors of the color gradient.
If the UsePalette property is set to true, the contour lines will be
colored using a predefined color palette that is specified by the PaletteStyle
If both the UseGradient and the UsePalette properties are set
to false, the contour lines will be colored using the color specified by the ContourPen
The number of contour levels can be specified with the NumLevels