基于Web的三维地理信息模型管理系统研究与开发  

Research and development on Web-based 3D geographic information model management system

作　　者：刘钊 杨金刚 LIU Zhao;YANG Jingang(Information Technology Institute,China Railway Harbin Group Co.Ltd.,Harbin 150006,China)

机构地区：[1]中国铁路哈尔滨局集团有限公司信息技术所,哈尔滨150001

出　　处：《铁路计算机应用》2023年第5期45-52,共8页Railway Computer Application

基　　金：中国铁路哈尔滨局集团有限公司科技计划项目(2022020)。

摘　　要：数字孪生技术在我国各行业的应用正在加速推进,三维地理信息(简称:3D GIS)模型是数字孪生技术不可或缺的基础数据模型,开发具有自主知识产权的3D GIS模型管理平台的必要性不言而喻。参考开源地理信息框架Cesium,使用Java和JavaScript语言、开源代码及国产模型转换工具,开发基于Web的3D GIS模型管理系统,实现了LOD计算、模型合并与序列化、渲染优化、模型压缩与解压、场景漫游自定义控制等关键技术,能够将由无人机航拍的倾斜摄影像片转换为在Web浏览器中浏览的3D GIS模型,支持大容量3D GIS模型数据管理,方便用户高效完成场景编辑和模型渲染,提供安全、简便的数据共享接口,能够与其它信息系统无缝集成,为各类业务应用开发提供所需的数字孪生资源,方便各类业务应用以空间信息为载体整合相关数据,为业务提升赋能。Today,the application of digital twinning technology in industries is accelerating.Since 3D geographic information(3D GIS)model is one of the indispensable basic data models of digital twinning technology,the necessity of developing 3D GIS model management platform with independent intellectual property rights is self-evident.By referring to the open source geographic information framework Cesium and using Java and JavaScript languages,open source code and domestic model conversion tools,the 3D GIS model management system based on Web is developed,and key technologies such as LOD calculation,model merging and serialization,rendering optimization,model compression and decompression,and customized control of scene roaming are realized.This system can convert oblique photograph taken by unmanned aerial vehicle into 3D GIS models browsed via Web browser,support largevolume 3D GIS model data management,facilitate users to efficiently complete scene editing and model rendering,provide safe and simple data sharing interface to enable seamless integration with other information systems.Besides,it can provide digital twin resources required for the development of various business applications and facilitate the integration of relevant data to empower business improvement by using spatial models as the carrier of various business applications.

关 键 词：数字孪生 三维地理信息模型 数据管理系统 倾斜航摄像片 LOD WEBGL 

分 类 号：U29[交通运输工程—交通运输规划与管理]