Gis-based Ground Fissures In Xi'an Forecast System Development And Research

Ground fissure was unique geologic hazards. Ground fissure of Xi'an was detected in the evening of 1950's, but measuring and researching started in the 1970's. Science and technology operator lucubrated to the distributing , extending , developing status , growth place and activity law of ground fissure. Since 1980's, the activity of ground fissure has been strengthening, and it brought catastrophic losing to city establishment and building. The research to ground fissure of Xi'an includes mechanism and preventive countermeasure. Preventive research of ground fissure has become an important field. Building the forecasting and analyzing system of ground fissure of Xi'an is for realizing the forecast of activity of ground fissure, basic data and measure data informationing and provide basic information for ground fissure researching and preventing. Based on the terrain, geologic condition and ground fissure distributing of Xi'an district and spatial data-base through mathematics method.After analyzing region datum, geologic datum , measure datum's information character and application character and based on the theory of spatial data-base and criterion of RDB and lucubrating conception model and logic model of these information, providing the need of forecast system of ground fissure of Xi'an.Based on the domestic and overseas research production, adopting "Gray model" and "Never net model" as the mathematics base to analyze and forecast the activity of ground fissure.In this thesis, based on analyzing GIS technology at present, take com and Mapgis, according system's need and device a series of function component such as MapEditOcx component etc.In the thesis, using VC++ as platform, integrating MapGis component , MapEditOcx component , multimedia component and realizing the forecast system of Xi'an ground fissure. Through system running and testing, the system bears perfect function steady performance and make it.