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The Application Of WebGIS Technique In Forest Fire Spreading And Aided Decision

Posted on:2009-06-19Degree:MasterType:Thesis
Country:ChinaCandidate:C ZhangFull Text:PDF
GTID:2120360275966685Subject:Computer application technology
Abstract/Summary:PDF Full Text Request
Forest fire is a natural calamity of forestry calamity, with the most effects on the social, economic, environmental development and the biggest destruct. Meanwhile, forest fire is a kind of extremely complex natural phenomena, which is influenced by various natural and social factors such as combustibles, landform, climate and so on. Moreover, the occurrence of the fires is paroxysmal. To judge the trend of the fires and adopt the corresponding actions in time, it is vital to control the local situation. Therefore, the decision-maker must master advanced technology to improve his ability of judgment and local superintendence.Taking Tahe Forestry Bureau of the Greater Xing'an Mountains in Heilongjiang Province as the main object, this paper researched the key technologies about ArcGIS server platform with WebGIS; comprehensively analyzed the development of the forest fires spread and its impact factors; introduced several models of the forest fires spread and their realization in the computer; discussed the application scope, conditions, advantages and disadvantages of the different models. Wang Zhengfei Model which was obtained by researching the forest fires spread of the Greater Xing'an Mountains, because of its good pertinence and simple operation, is suitable in the area where the slope is lower than 60°. Therefore, Wang Zhengfei Model could be used as this paper's forest fires spread model. Meanwhile, expanded equations of fires spread speed of 5 directions which were researched by Mao Xianmin et al., and obtained the formulas of the fires spread speed of each direction. Based on the models of the forest fires spread, by the mathematical model of forest fires fighting and network analysis functions of ArcGIS, this paper realized the aided decision systems of forest fires fighting, meanwhile could provide references for the fires commanders.Taking ArcGIS Server 9.2, .Net, ArcSDE, Oracle as research platform, component development based on the interface as support, ArcObjects as a tool, achieved a basic map operation, integrated query, fires location, fires spread, aided decision, and business analysis, the six functions.
Keywords/Search Tags:WebGIS, forest fireproofing, forest fires spread, ArcGIS Server, aided decision
PDF Full Text Request
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