Star plots are the cousin of triangle plots, simply with more points. It is a multi-variable comparison where the values all add up to a single quantity. The star plot gives a visual representation as to how those values are distributes among the varibles. This example scores the taste of wine.
Found - http://www.avenuevine.com/movabletype/archives/BOLLA-MEZZACORNA-w.jpg
This blog is a map catalog in which I am displaying fifty different types of maps and a tid-bit of information that looks into the purpose of the map!