] generates a density plot from an array of height values.
ListDensityPlot returns a DensityGraphics object.
ListDensityPlot has the same options as DensityGraphics.
Successive rows of array are arranged up the page; successive columns across the page.
See notes for DensityGraphics.
See the Mathematica book: Section 1.9.9.
Here is a density plot made from a table of data.
Evaluate the cell to see the graphic.