| 三维虚拟地球中移动对象的时空数据组织方法 |
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| 引用本文： | 陈静,袁思佳.三维虚拟地球中移动对象的时空数据组织方法[J].武汉大学学报(信息科学版),2017,42(3):384-389. |
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| 作者姓名： | 陈静 袁思佳 |
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| 作者单位： | 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉, 430079 |
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| 基金项目： | 国家863计划2012AA121401四川省测绘地理信息局科技计划J2015ZC03湖北省自然科学基金2016CFA003 |
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| 摘 要： | 针对三维虚拟地球中实时GIS数据组织、管理与动态可视化的要求，设计了三维虚拟地球中移动对象的时空数据组织方法。提出了基于HR-tree扩展的时空索引方法，实现了对虚拟地球中移动对象的检索与查询，并基于三维虚拟地球平台对本文方法进行了实验，结果验证了本文方法的有效性和可行性。
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| 关 键 词： | 虚拟地球 移动对象 数据组织 |
| 收稿时间： | 2015-03-15 |
Spatio-Temporal Data Organization Method of Moving Objects in 3D Virtual Globes |
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| Affiliation: | State Key Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China |
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| Abstract: | Moving object data contains a wealth of information and can provide the necessary data for traffic management, military simulation, and city planning, and so on.So the research of moving objects is becoming more and more important and meaningful. However, the recent researches on moving objects mostly deal with query and forecast of the location information of moving objects, while the dynamic changes of other attributes are less involved.And, the smart city applications based on virtual globes mostly deal with static three-dimensional information. Real-time and multi-dimensional dynamic spatial information management and visualization technology remain to be further studied. In this paper, aiming to meet the requirements of management and dynamic visualization for real-time GIS data in the virtual globe, firstly, according to the three-dimensional virtual globe tile data organization, based on real-time access of moving objects data on the server for virtual globe client, a spatiotemporal data organization method of moving objects in three-dimensional virtual globes is proposed, which needs to be able to facilitate the performance of the dynamic changes of moving objects relevant properties information (speed, photos, videos, etc).Secondly, according to the characteristics of large volumes and real-time access, a map between moving objects and virtual globe tile pyramid is built, which ensures the temporal consistency of spatiotemporal data and tile data, an extended HR-tree-based spatiotemporal index is proposed, which achieves the retrieval and query for moving objects in the virtual globe and ensures index consistency of the data accessed real-time and the existing data. Finally, using these methods, some virtual globe-based experiments are tested and some suggestions are discussed. |
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