Math Software  -> Graph Function (Graph Calculus) -> Contour Plot

Function Grapher and Visual Calculus have the ability of creating contour plot. Cotour plot shows data values of the third dimension by connecting points with the same z values.
The following figure is a contour plot of function x=u, y=v, z=sin(u)*sin(v).

Related Topics

Color Map
Vector Field Plot

Math Software -> Graph Function (Graph Calculus) -> Contour Plot