摘要
定性空间推理的RCC理论能够比较全面地表达空间对象的拓扑关系.但由于不支持混合维空间对象,RCC不能直接用于空间查询.本文扩展了RCC,建立了能表达混合维空间关系,更适合于空间查询的空间关系模型MRCC.该模型采用GIS中常用的数据结构,支持混合维空间对象的全拓扑(mereotopology)关系,并根据混合维对象的特点建立了与维数无关的统一的方向、距离关系.利用该模型扩充了标准SQL语言的关系代数,实现了混合维定性空间查询语言MQS-SQL.
The RCC theory of Qualitative spatial reasoning which completely express the topology of spatial objects couldn' t be directly appled to spatial query, because it can not support multi-dimension. We extend the RCC and build a spatial query oriented spatial relation model MRCC with multi-dimensional objects supported.This model follows the common data structure of GIS, supports multi-dimensional mereotopology relation and dimension independent union direction and distance relations. We improve the algebra of standard SQL with this spatial relation model,design and implement a multi-dimensional qualitative spatial query language MQS-SQL.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2002年第12A期1995-1999,共5页
Acta Electronica Sinica
基金
国家自然科学基金(No.69883003)
国家863高技术项目(No.2001AA115160
No.863-306-ZB05-01-2)
