3. Solution model

## 3.3 Landscape representation

To enable visualization, a topologically-organized map is not sufficient. The problem resides, since only order is conserved in the fact that the distances among elements are lost. Thus, a method to visualize the structure of the self-organizing map is followed. This can be done by giving an approximation of the weight vector distribution in the self-organizing map. Two methods can be used to complete this task: the unified matrix and the s-diagram [Siemon and Ultsch, 1992]. Since the latter gives a poor approximation of the weight vector distribution, only the first one will be examined.

**3.3.1 ** - Unified matrix method-
**3.3.2 ** - Visualization-

Cyberspace geography visualization - 15 October 1995

Luc Girardin, The Graduate Institute of International Studies