基于关系模型的历史行政区时态栅格表示方法研究

发布时间：2018-05-28 06:06

本文选题：关系数据库 + 时空数据模型　；参考：《河北师范大学》2017年硕士论文

【摘要】：随着信息技术的发展,时空数据的获取和应用更加容易。如何更好地利用时空数据,对其内部的数据价值进行挖掘利用是目前的研究热点之一。栅格数据在空间分析方面具有得天独厚的优势,关系数据库技术和基于关系数据库的查询语言已经成熟。将关系数据库和栅格数据通过查询语言关联,并通过GDAL提供的接口生成可视化的栅格图片,具有较好的实用价值。本文首先从关系数据库扩展时间和空间的方法入手,对当前国内外有关时空数据模型的研究进展进行了论述,并针对现有的历史空间信息的存储和表达方法存在的问题进行了讨论,从应用角度出发设计了一种基于历史空间网格信息的关系数据库,并论述了它的时间语义、空间语义、属性特征及其时空变化,同时,介绍了GDAL在栅格数据生成中的作用及其内部数据集、坐标系统、波段、颜色表的特点。其次,基于扩展型关系数据库的E_R模型实现了数据库的逻辑模型和字段的编码设计,其设计符合第三范式要求,具有通用性。同时,在关系数据库的基础上,实现了历史空间信息的时间、空间、属性及两者以上的复合查询功能以及时态栅格表达模块的设计和实现。能够对区域的整体或局部的不同时空的专题信息的变化进行查询,并生成对应的属性表:时态栅格表达模块的实现解决了数据库数据从静态的属性信息到时空信息可视化表达的问题。最后,利用公元612年到公元959年的京津冀历史行政区数据对提出的扩展型关系数据库和时态栅格表达模块进行了验证,结果表明:扩展型关系数据库可以实现时空信息的存储、管理、分析、显示的需求,通过栅格可以准确、直观、灵活的表达时空信息并在此基础上通过接口实现栅格的空间分析功能,效率较好,易于推广。
[Abstract]:With the development of information technology, the acquisition and application of spatiotemporal data become easier. How to make better use of spatiotemporal data and how to mine and utilize the internal data value is one of the research hotspots at present. Raster data has a unique advantage in spatial analysis, and the technology of relational database and query language based on relational database have matured. The relational database and the raster data are associated with the query language, and the visual raster images are generated by the interface provided by GDAL, which has good practical value. This paper begins with the methods of expanding time and space of relational database, and discusses the research progress of spatio-temporal data model at home and abroad. This paper discusses the problems existing in the existing methods of storing and expressing historical spatial information, designs a relational database based on historical spatial grid information from the point of view of application, and discusses its temporal and spatial semantics. At the same time, the function of GDAL in raster data generation and the characteristics of internal data set, coordinate system, band and color table are introduced. Secondly, Estur model based on extended relational database implements the logical model and field coding design of the database, which meets the requirements of the third normal form and is universal. At the same time, on the basis of relational database, the design and implementation of temporal grid representation module of historical spatial information are realized. The ability to inquire about changes in thematic information about the whole or part of a region in different time and space, The realization of temporal grid representation module solves the problem of database data from static attribute information to spatio-temporal information visualization. Finally, the extended relational database and temporal raster representation module are verified by using the data of Beijing-Tianjin-Hebei historical administrative region from AD 612 to AD 959. The results show that the extended relational database can store space-time information. The requirements of management, analysis and display can be expressed accurately, intuitively and flexibly through the grid. On the basis of this, the spatial analysis function of the grid can be realized through the interface, which is efficient and easy to popularize.
【学位授予单位】：河北师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：D691;P208

【参考文献】