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Alternative TitleHTM-ST: A Data Model Supporting Spatio-Temporal Coupled Computation for Solar-Terrestrial System
康栋贺; 邹自明; 胡晓彦; 钟佳
Source Publication地球信息科学学报
Keyword数据组织模型 层次三角网格 时空编码 日地空间
Other AbstractData Model is the basis for the effective management, sharing and application of scientific data. Nowadays, the sematic data model is a conventional and dominant data organization method in the solar-terrestrial physics domain which aims to describe data along with its various metadata, such as observatories, instruments, and data types etc. However, it's difficult to support mass data processing and correlation analysis because the model neglects the temporal and spatial relations among data. Hence, a data model supporting spatio-temporal computation should be established to facilitate data discovery, fine structure identification, coupling relation research and spatio-temporal evolution analysis and other research hotspots of solar-terrestrial physics. Therefore, this paper proposed a computable spatio-temporal data model, HTM-ST that supports these applications. On the basis of the HTM global discrete grid, this model established discrete spatio-temporal subdivision by extending HTM's spherical units to equal-divided time dimension. Besides, a novel spatio-temporal coupled coding algorithm is described to represent these high-dimensional units in the one-dimensional space. Meanwhile, the model's storage scheme is designed and implemented in the HBase platform based on the model's subdivision structure and coding algorithm. In this paper, a prototype system is implemented to evaluate the efficiency of the model, by comparing multiple spatio-temporal queries over energetic particle data observed by five polar orbit satellites. The experimental results show that HTM-ST data model is more efficient and robust. It could be used as the solar-terrestrial physics data organization and storage foundation for spatio-temporal relationship.
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Document Type期刊论文
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GB/T 7714
康栋贺,邹自明,胡晓彦,等. 支持时空耦合计算的HTM-ST日地空间系统数据组织模型[J]. 地球信息科学学报,2017,19(6):735-743.
APA 康栋贺,邹自明,胡晓彦,&钟佳.(2017).支持时空耦合计算的HTM-ST日地空间系统数据组织模型.地球信息科学学报,19(6),735-743.
MLA 康栋贺,et al."支持时空耦合计算的HTM-ST日地空间系统数据组织模型".地球信息科学学报 19.6(2017):735-743.
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