WebGIS 3D Visualization

Compared with traditional GIS, three dimension visualization ofgeographical information based on WebGIS are cbaracterized by: l. Datashare and varianty of resources; 2. The development, publish and executionof visual application on the distribution computing environment,usingVRML and 3D Webpage Designing; 3. Browse of 3D Visaul GISInfOrmation by common browser with 3D plug-in; 4. WebGIS 3Dvisualhation being important component parts of digital earth.In WebGIS system design, netWork data share and visualization scenedesign on thcoretical research and practicc, The author has:1. Put forward a WebGIS arcbitecture using Java/CORBA technoIogy andGIS metadata integration,after analysis several WebGIS implementmethods.2. Compared three main technologies of Distributed Component Model,concIuded that the Ja"a IDL is a flt method to dcveloping t1'ebGIS 3D' visualhation appIication, and presented designing process.3. By analysing FGDC, lSOiTC21l etc famous metadatastandard,pointed out than establishing GIS metadata system is a goodapproach to implementing WebGIS data share, and thus worbog out awater project metadata standard.4. Presented functional component and work principle of WcbGIS 3Dvisualhation.5. Studied principle,method and development process of using rmLpIug-in standard to design WebGIS 3D visualization application andachieved ideaI resuIts in designing 3D landscape of water prOjecL6. Presented necessity, design process and functional 8nalysis of developingspecial browser pIug-iD fOr WebGIS 3D Visualisation.7. Presented an aIgorithm on the markS of geographical elementS on thegrid DEM.