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Maps are the fundamental documents supporting the process of crisis management. It is important that the events formed on them were presented in the most credible and legible way. Legible, meaning that they should depict credible spatial information on the basis of presented spatial data. Only such formulation guarantees aid of the highest quality and organisation of actions during crisis situations. They also constitute extremely valuable content showing spatial location of the threats which have already occurred...

Network methods were used for the first time to plan and control maintenance works on a chemical apparatus installation in the United States in 1956. These were simple methods improving project management. The development of the network structures would not have been possible without the technological progress which has been taking place over the last half a century. Complicated networks can be programmed during a short period of time thanks to high computing power. Network models can be currently used for the sim...