Algorithms for Hierarchical Spatial Reasoning

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dc.contributor.author Papadias, D en
dc.contributor.author Egenhofer, MJ en
dc.date.accessioned 2014-03-01T01:45:53Z
dc.date.available 2014-03-01T01:45:53Z
dc.date.issued 1997 en
dc.identifier.issn 13846175 en
dc.identifier.uri http://hdl.handle.net/123456789/24768
dc.relation.uri http://www.scopus.com/inward/record.url?eid=2-s2.0-0031421998&partnerID=40&md5=96daad7cca3d4532c0426f8f29988a5c en
dc.subject Direction relations en
dc.subject Geographic databases en
dc.subject Path consistency en
dc.subject Spatial reasoning en
dc.subject.other algorithm en
dc.subject.other geographical database en
dc.subject.other hierarchical reasoning en
dc.subject.other spatial reasoning en
dc.title Algorithms for Hierarchical Spatial Reasoning en
heal.type journalArticle en
heal.publicationDate 1997 en
heal.abstract In several applications, there is the need to reason about spatial relations using multiple local frames of reference that are hierarchically organized. This paper focuses on hierarchical reasoning about direction relations, a special class of spatial relations that describe order in space (e.g., north or northeast). We assume a spatial database of points and regions. Points belong to regions, which may recursively be parts of larger regions. The direction relations between points in the same region are explicitly represented (and not calculated from coordinates). Inference mechanisms are applied to extract direction relations between points located in different regions and to detect inconsistencies. We study two complementary types of inference. The first one derives the direction relation between points from the relations of their ancestor regions. The second type derives the relation through chains of common points using path consistency. We present algorithms for both types of inference and discuss their computational complexity. en
heal.journalName GeoInformatica en
dc.identifier.volume 1 en
dc.identifier.issue 3 en
dc.identifier.spage 251 en
dc.identifier.epage 273 en

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