多粒度时空对象空间关系的统一表达与计算
发布时间：2018-12-05 21:07
【摘要】：空间关系表达了空间数据的相互约束,在空间查询语言、数据检索及空间分析中具有重要作用。当前关于空间关系的研究,多基于简单地理对象,或者只对某一种空间关系进行独立的算法设计,难以满足多粒度对象多种空间关系的统一表达与计算。为此,本文利用几何代数运算的对象无关性和维度无关性,构建简单对象空间关系计算算子,并将其推广到多粒度对象,实现全空间地理信息系统框架下多粒度对象三种空间关系的一体化表达与计算。最后,以三角网求交算法为例,证明了算法的可行性,为全空间GIS中空间关系的表达和计算提供了借鉴。
[Abstract]:Spatial relations represent the mutual constraints of spatial data, and play an important role in spatial query language, data retrieval and spatial analysis. At present, the research of spatial relationship is based on simple geographical object, or only one kind of spatial relationship is designed independently, so it is difficult to satisfy the unified expression and calculation of multi-granularity object and multi-spatial relationship. In this paper, the object independence and dimensionality independence of geometric algebraic operations are used to construct a simple object spatial relation computing operator, which is extended to multi-granularity objects. The integrated representation and calculation of three spatial relationships of multi-granularity objects under the framework of full spatial GIS are realized. Finally, the feasibility of the algorithm is proved by taking the triangular intersection algorithm as an example, which provides a reference for the expression and calculation of spatial relations in the full-space GIS.
【作者单位】： 南京师范大学地理科学学院;南京师范大学虚拟地理环境教育部重点实验室;南京师范大学计算机科学与技术学院;
【基金】：国家重点研发计划项目(2016YFB0502300) 国家自然科学基金项目(41571380)
【分类号】：P208
[Abstract]:Spatial relations represent the mutual constraints of spatial data, and play an important role in spatial query language, data retrieval and spatial analysis. At present, the research of spatial relationship is based on simple geographical object, or only one kind of spatial relationship is designed independently, so it is difficult to satisfy the unified expression and calculation of multi-granularity object and multi-spatial relationship. In this paper, the object independence and dimensionality independence of geometric algebraic operations are used to construct a simple object spatial relation computing operator, which is extended to multi-granularity objects. The integrated representation and calculation of three spatial relationships of multi-granularity objects under the framework of full spatial GIS are realized. Finally, the feasibility of the algorithm is proved by taking the triangular intersection algorithm as an example, which provides a reference for the expression and calculation of spatial relations in the full-space GIS.
【作者单位】： 南京师范大学地理科学学院;南京师范大学虚拟地理环境教育部重点实验室;南京师范大学计算机科学与技术学院;
【基金】：国家重点研发计划项目(2016YFB0502300) 国家自然科学基金项目(41571380)
【分类号】：P208
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