Study On Geological Hazards In ZhiJin County Database Construction Based On GIS

Zhe zhijin County is our fragile geological environment, one of the disasterpro-ne areas. In recent years, with the intensification of human activities, geological envir-onment constantly varying degrees of damage, every year a different size, number of geological disasters, to pose a serious threat and loss of life and property from Jiang Renmin. According to preliminary statistics, as of 2011, seven people have been killed and destroyed 165 houses, destroyed 137 acres of farmland, the direct economic losse of 3.293 million yuan; In addition, there are many places in the area of disaster risk points, including housing, schools, bridges, roads and farmland. The threat of econom-ic losses amounting to 102.208 million yuan. Thus, from the river county geological disasters pose a serious threat to life and property of the State and the people.In this paper, "Guizhou Province geological disaster monitoring and early warnin g and decision support system" as the basis for the study from congjiang County, elaborated the process of establishing a database of geological disasters from River County. Establish a large database of detailed process is very important, it can not only provide reliable data basis for the analysis of geological disasters, can also provide some reference value in the same building database.By studying the following conclusions can be drawn:(1) Comprehensive data related standards, combined with the actual situation of the river from the basic data of geological disasters, and establish the basis of geological disasters from the river database data standards(2) to build effective spatial data model associated with spatial data and business data. Spatial database modeling the actual business logic space abstracted into a database table corresponding to the table structure.There are multi-dimensional solid object space, more defined features. A "relationship- Object" database modeling technology, so that the relationship of spatial data objects and their inter-connection rules can be easily said that store, manage and scale. The introduction of this data model is aimed at the underlying data by adding geological disaster management approach, behavior and rules to make data more intelligent and professiona(3) Reasonable division of subsystems and modules, Guizhou Province to establish geological disasters integrated information systems, electronic maps, data sheets and rich interactive interface combine to achieve the integration of spatial and non-spatial information management, integrated display, synchronized, Internet inquiries, use comprehensive statistics, valid driver spatial database, database maintenance operations, special databases and metadata databases and datasets(4) Browse through the establishment, management and maintenance of the system from a statistical analysis of geological disasters zhijin County, database, data, so that data and data management staff of various departments convenient, ensuring security and consistency of data...