] generates a contour plot from an array of height values.
ListContourPlot returns a ContourGraphics object.
ListContourPlot has the same options as ContourGraphics.
Successive rows of array are arranged up the page; successive columns across the page.
See notes for ContourGraphics.
See the Mathematica book: Section 1.9.9.
Here is a contour plot of a perturbed cylinder.
Evaluate the cell to see the graphic.