Integrate Their Applications, The Flash-based Webgis System And The Virtual Scene

While WebGIS (World Wide Web geographic information system)is unceasingly thorough studied and the application is popular, The traditional network GIS realization technology already could not adapt the WebGIS application demand, Specially in the aspect of the spatial data mutually operates, the WebGIS system structure, spatial information three dimensional visible and so on. WebGIS is the current important direction of GIS's development, it is effective way that GIS trends "socialization", and it is one of core platforms that construct "the digital Earth", "the digital city" .Currently WebGIS system of space date information network issue form mainly is the form of various raster format or spaces map form,the space information resource is unable to share and reuse in the process of system integration. Flash is technology which is issued by macromedia, used to display and transform Vector graph. Although so far not yet issue WebGIS products which are based on flash technology, but as a result of its advantage of vector characteristic and network application Essence, it can very good satisfy GIS regarding the spatial data graphical display request. At present, in the situation which further enhances to the WebGIS browser manifestation request, the research and exploration how to use the flash technology to construct WebGIS platform system structure and the realization technology with the extension, the probability and the interaction technical characteristic has the vital significance, resolve the problem of space information resources sharing and expression, then on the basis of the research, the development of the advanced WebGIS application is a study focus of the essay. Moreover, with the rapid development of computer technologies and virtual reality, WebGIS map publish system has been injected new vitality; in the situation of real 3D GIS development immaturely, the study of two-dimensional electronic maps and virtual scene integrated WebGIS system has some practical significance.In view of above questions, this article mainly analyzes how to apply Flash with WebGIS realization technology, including expansion existing WebGIS system structure, using Flash to be Webgis client, realizing space information visible, massgeography data access and transmission communication technology, summaries and analyzes the realization technology of these functions based to flash. Moreover based on the foundation, Integrates the virtual reality technology, topic proposes new idea that the two-dimensional electronic map and the three dimensional virtual scene are be contrast browsed, Attribute information inquiry, 2D electronic map and three dimensional virtual reality browsing scene are complete integrated on a contact surface ,combine the advantage of 2D digital map and 3D virtual scene, at the same time overcomes the disadvantage of 2D digital map and wandering astray of 3D virtual scene. In the experiment part of this paper, from methods of virtual modeling used frequently in recently, separately introduces under the network environment two-dimensional and the three dimensional integrated system structure and the information inquiry technology, integrate many kinds of computer software technology, example as VRML,ASP.NET and database and so on, and designs the two-three dimensional integrations 's prototype system. Finally, this article stresses some concluding remarks, and the research content in the near future is put forward.