矢栅一体化拓扑关系的度量描述研究

Quantitative Representation of Topology Relations Based on Integrative Data Model of Vector and Raster

首先,借助传统的9交模型确定了矢栅一体化数据模型拓扑关系的定性表达;其次,利用重叠部分的栅格数目占各个目标的比率来确定交叠分量,同时根据栅格的统计量来描述两目标接近程度的邻近分量;最终,将定性的拓扑关系、用以度量化描述的交叠分量及邻近分量以三元组的形式来描述目标间的拓扑关系,从而更加有效地实现了多类型地理目标拓扑关系的度量化描述。

In Geographic Information Systems （GIS）, the exploration of the metric descriptions for to- pological spatial relations has been an active area of research. Construction processing of a metric de- scription is directly influenced by spatial data model. Vector and raster data models are the two types of basic spatial data models. These two data models have complimentary advantages in terms of de- scribing spatial relations between objects. The integrative data model of vector and raster stems from the integration of the advantages of vector and raster data model. Firstly, this paper defines qualita- tive topology relations by using the 9-intersection model. Secondly, the ratio of the grid number of in- tersection to the two objects, is used to determine the intersect component. Thirdly, the maximum and minimum distances are used to determine the closeness component. Finally, a triple group inclu- ding qualitative topology relations, intersect component and closeness component, is proposed to de- scribe topology spatial relation. Because of two advantages of integrative data model of vector and ras- ter, the metric description of topology between different type objects can be realized more effectively in this paper.