University at Buffalo, The State University of New York
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Andrew Skupin: In the figure above, keywords extracted from geography conference abstracts are spatialized in a two-dimensional visualization using a self-organizing map approach. The keywords are clustered into categories according to similarities between them. Each category is labeled by a representative root word (a form of word after all affixes are removed).

David Mark: The figure demonstrates the frequency of words used in the title of PhD dissertations completed during 1973-2008 in geography.