CoSDE:spatial database engine of VegaGIS;

This paper is based on the research work of the Vega Information Grid(VIG) project,and addresses the model of virtual community in information g.

this paper is based on the research work of the Vega Information Grid(VIG) project, addresses the model of virtual community in information grid and its Full Life Cycle.

This dissertation is based on the research work of the Vega Information Grid project, and addresses the access control mechanism of the information grid.

Division of flow units in reservoir aided with geographic information system;

A designing outline for the special equipment to get geographic information system of safety supervision;

Study of the spatial distribution rule of measles prevalence in Gansu Province by geographic information system;

An environmental-economic analysis was developed to provide optimal scenario selection using geographic information system(GIS) components in an integrated information management system.

According to poor integrality of overlaying rock in Beiminghe Iron Mine,China,a research was done for predicting the subsidence of metal mines based on geographic information system(GIS) and probability-integral method.

Objective To find out the fever prevalence rate in each resident point and to assess the sensitivity of health facility-based typhoid fever surveillance system by applying geographic information system(GIS) technology.