基于OSG的城市三维GIS系统的初步设计与开发

Design and Development of Urban 3D GIS System Based on OSG

相对于二维GIS系统,城市三维GIS系统具有直观、准确的优点,是数字城市建设的一个重要环节。基于OSG引擎,设计了一个城市三维GIS系统,详细阐述数据制作和系统开发两大部分,系统数据包含三维地形模型、地上地下景观三维模型和属性数据;重点分析了OSG对海量数据的高效组织和调度机制,最后对系统的软件功能予以展示。

Compared to 2 D GIS system urban 3 D GIS system has the advantage of intuitive and accuracy ,it is an im-portant step of digital urban construction .This paper designed architecture of urban 3 D GIS system and introduced techni-cal route of 3 D GIS system building ,two major parts which is data production and system development were detailedly pr-esentated in this paper .In this application system the used data includes 3D terrain model,aboveground landscape 3D model,underground landscape 3D model and attribute database ,and the core supporting technology of system develop-ment is OSG 3 D engine .This paper prominently analysed OSG efficient organization and scheduling mechanism to mas-sive data and demonstrated system software functions .