Distribution of Forest Fire Prevention Resources Based on GIS

摘要

Viewshed analysis is a method and technology, which manages geometry principles and computer graphic technology to resolve the problem of geographic aggregation of monitoring points. This paper analyses the forest resources and its main fire prevention factors, such as forest types, forest ages and forest shade density etc., within the scope of the visible monitoring points, and discusses how to maximize the area under forest fire monitoring without increasing the number of monitoring points and changing equipments performance. With the target of maximuming monitoring area, the paper studies on the best monitoring position within certain area, and to convert it into how to optimize the visible area so as to make locating monitoring points much more scientific, reasonable and efficient.