基于OSG的OBS导航定位系统三维可视化场景实现

摘要

在海洋地震勘探中,海底地震仪OBS(Ocean Bottom Seismometer)导航定位系统可提高OBS投放精度.系统是在VS2010和OSG 3.0.0的可视化开发环境下,基于MFC框架,运用三维可视化技术搭建OBS投放场景,实现场景节点有效组织与管理,动态显示船只和OBS运动过程.采用Chunked LOD算法处理测深格网数据构建地形细节层次模型,应用OSG数据库分页管理和分页细节层次节点技术实现了OBS投放场景地形数据动态调度.通过场景漫游功能实现了OBS投放过程的多角度三维可视化监控,直观反映海底地形地貌与作业过程,提高了OBS投放精度和数据质量.%In marine seismic exploration, OBS navigation and positioning system can improve the OBS delivery precision.In order to organize and manage scene nodes efficiently and display movements of ship and OBS dynamically, the system uses 3D visualization technology to build OBS delivery scene based on MFC framework under the visual development environment of VS2010 and OSG 3.0.0.We use bathymetric grid data to generate terrain LOD model based on Chunked LOD, and use DatabasePager and PagedLOD technology to realize dynamic scheduling of terrain.The system achieves 3D visualization and multi-angle surveillance of OBS delivery process through roaming.It shows the seabed topography and operation process directly, and improves the OBS delivery precision and data quality.