The Study Of Areas Prone To Geological Disasters In Guangxi Based On ArcGIS

Guangxi is a typical Karst landform, mainly in the mountainous terrain, followed byhill, basin and plain, East, West, North surrounded on three sides by mountains, south ofLinhai, on the formation of the epsilon-type structure of the Guangxi basin, complexgeological structure, fault zone distribution is dense, natural environment is fragile,vulnerable to external force and geological disasters.Because of the special geological conditions and topography, affected by climatefactors in Guangxi District, is prone to geological disasters, geological disasters, widedistribution, many types of disasters. The geological disaster is the strong rainfall oftenaccompanied by a short time or continuous rain fragile area and artificial factors ingeological environment and unreasonable changed the topography of the region. Slope,landslide, collapse, debris flow, collapse, ground cracks and other geological disastersoften happen in Guangxi, according to statistics text data, Guangxi has18744geologicaldisasters, through the statistics of geological disaster spatial data16062. Guangxi hasestablished the geological disaster management system, according to Guangxi’s "goldenland project" plan, Guangxi three-dimensional geological disaster system project will be.GIS technology has powerful spatial analysis function, comprehensive treatmentand analysis of spatial data, spatial analysis and data management of geologicaldisasters by using GIS technology, has important significance for improving governanceand prevention of geological disasters information.The main work of this paper are as follows:The theoretical basis of master GIS technology, analysis algorithm structure model,data structure types, GIS integrated graphics algorithm, different subjects in relationaldatabase management, interpolation algorithm, division, network analysis technology,the main data structure of vector data and raster data structure structure.The establishment of Guangxi geological hazard database, through the collationand analysis of geological disasters in the Guangxi slope, landslide, collapse, debris flow,collapse, ground cracks and other geological disasters of the geographical spatial data,the characteristics of mass data storage of the establishment of the Guangxi geologicaldisaster database by using ArcGIS software, Catalog application module ArcGIS theestablishment of geological hazard database in Guangxi the geological disaster data, thesame management, geological disaster database of geological hazards in thegeographic spatial data, terrain and landform, geological data. Spatial analysis and statistical analysis of the Guangxi geological disaster factorsusing ArcGIS, spatial query, slope analysis, buffer analysis, overlay analysis, networkanalysis and statistical analysis, control of geological disasters in the distribution andeffect factors of Guangxi, in order to better management and analysis of geologicalhazard data.Weight analysis using entropy method and fuzzy mathematics method for all kindsof geological disasters impact factor, according to the weight value to understand thegeological disaster directly influence important factor influence the types of geologicalhazards, main factor is different in different. According to the result of calculation theweights assigned to the cell network impact factor data layer, the comprehensiveanalysis of geological hazards.Based on the ArcGIS10cloud computing method will be released in geologicalhazard susceptibility maps to the Guangxi land and resources Wan, for levels and landdepartments to share data resources, in the cities and counties to carry out geologicaldisaster management and prevention have great significance.