In cartography and geology, a topological map refers to a map that has been simplified so that only vital information remains and unnecessary detail has been removed. These maps lack scale, and distance and direction are subject to change and variation, but the relationship between points is maintained. A good example of a topological map is the tube map of the London Underground.
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The radial layer of a Kohonen network , with units laid out in two-dimensions, and trained so that inter-related clusters tend to be situated close together in the layer. Used for cluster analysis (Kohonen, 1982; Fausett, 1994; Haykin, 1994; Patterson, 1996). See, Neural Networks .
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