Research on the WebGIS Space Vector Data Based on the J2EE

Web GIS is becoming the developing hotpot for GIS With the development of Internet technology .Geographical Information System (GIS) is an information system which stores analyzes and visually express spatial data . WebGIS can Provide not only simple text and data , but also graphics and images to more and more people. WebGIS is the outcome of Internet development and information sharing . However, many traditional GIS software adopts file-based data organization, which only publishes GIS data less. The technology of publishing mass vector and image database would be restricted . It is necessary to take the proper syncretizing among such technologies as Web, software engineering, programming languages, database and GIS functions into account and consider how to provide a simple and convenient application mode to client. In This paper the author first discuss the model about the data-memory, organizing and the data publishing, then research the design model and the realize model of the Web GIS based on J2EE. Analyse the work principle , merit , demerit and the realizing method of the constitutes of Web GIS, i.e. the structure of three layers.