Application of map and file information visualization system to comprehensive division of natural disasters-Taking the Changjiang Valley as an Example

This paper generalizes the makeup and forming dynamic mechanism of natural disaster systems, princi-ples and methods of comprehensive division of natural disasters, as well as structure, function and up-build routes of map and file information visualization system (MFIVS). Taking the Changjiang(Yangtze) Valley as an example, on the basis of revealing up the integrated mechanism on the formations of its natural disasters and its distributing law, there-after, the paper relies on the MFIVS technique, adopts two top-down and bottom-up approaches to study a comprehen-sive division of natural disasters. It is relatively objective and precise that the required division results include three natu-ral disaster sections and nine natural disaster sub-sections, which can not only provide a scientific basis for utilizing natu-ral resources and controlling natural disaster and environmental degradation, but also be illuminated to a concise, practi-cal and effective technique on comprehensive division.