Clicking the links below will lead you to important information about 3D spline area charts:
About 3D Spline Area Charts — Gives you a brief description of 3D spline area charts, and explains why you would want to use them.
Working with 3D Spline Area Chart Data — Provides information on the type of data necessary to generate 3D spline area charts (e.g., number of numeric columns), as well as how data is mapped to it.