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

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 typesof 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 fromthe 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 maximumand 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 effectivelyin this paper.