This is a "map" of geographic knowledge compiled by Dr Andre Skupin at San Diego State University. I don't really understand it much but it's an interesting concept anyway. His own description:
"Visualization of the geographic knowledge domain based on more then 22,000 conference abstracts submitted to the Annual Meeting of the Association of American Geographers (1993-2002). Landscape features express the degree of topical focus, with elevated areas corresponding to more well-defined, topical regions and low-lying areas corresponding to a mingling of various topics. Dominant terms are used as labels for topical regions."
