| In recent years,with the deepening of the urban informatization,urban 3D geographic information system(3D GIS)present a strong momentum of development in various fields,everyone in themselves is building their 3D GIS,such as architectural design,urban planning,mobile communication,tourist industry,Navitel Navigator,Pollution thing diffusion,Disaster management and real estate management,etc.However,the different application purpose of each business part and the diverse development background of developers make 3D models,data structure and the system isolated from each other.The emergence of City Geography Markup Language(CityGML)provides a unified data model for 3d geographic information system.The paper aims to develop 3D GIS based on CityGML,and store the models to space database to manage,and realize 3D models network sharing through calling service interface,the main research work is as follows:1.Research CityGML coding standard,apply it to 3D models,such as building,and discuss the model of simplified method to realize the model storage and query function.2.Research data structure of CityGML and the mapping relationship between database table,store modeling data to database efficiently and speedily.3.Study the method of Citygml4j which is a Java package.4.Study the W3DS standard(revised edition),main research GetCapabilities interface and GetScene interface. |
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