文献类型： 外文期刊
第一作者： Zhu, H.
作者： Zhu, H.;Wu, H.;Zhu, H.;Wu, H.
作者机构：
关键词： update information;spatial object;increment;spatial databases;temporal GIS;snapshot delta and semi-structure
期刊名称：JOURNAL OF SPATIAL SCIENCE （ 影响因子：1.981； 五年影响因子：1.893 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： To efficiently transmit the update of information by the incremental mode, the incremental update of spatial objects is redefined with a combination of the change process and corresponding snapshot delta. A formalization model for representing the snapshot delta is established. By mapping the snapshot delta with the corresponding change process, a typology of the increment which provides preconditions for extracting, representing and merging incremental change is given. A data modelling framework with low redundancy for organizing the increment is introduced. It is shown how useful increments can be queried from such a model using the LOREL query language. Finally, a simplified case study in the application domain of a topographical database update scenario is examined closely. It demonstrates that the new approach is more effective in specific scenarios when the change ratio of the spatial object is relatively low.
分类号： P9
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