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A word from the author ... the information visualization concept
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Information visualization is concerned with reducing or refining the cognitive overheads of understanding complex information structures through the use of visual representations and interactive elements. Information visualization traditionally focuses on finding meaningful and intuitive ways to represent non-spatial and non-numeric information to people. Currently much of the research and investigation in this field is concerned with the development of strategies and approaches in order to visualize information sources and data as a means toward helping people interpret and understand the information. Hyperbolic trees, spiral, cone tree, and others, are some of these developed approaches.
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