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A 16-Intersection Matrix for the Polygon-Polyline Topological Relation for Geographic Pictorial Query Languages

  • Anna Formica
  • Mauro Mazzei
  • Elaheh Pourabbas
  • Maurizio Rafanelli
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7465)

Abstract

In this paper we address the problem of formalizing qualitative topological relationships between geographical objects in a Geographical Pictorial Query Language (GeoPQL) in order to completely capture the semantics of the user queries. We focus on the polygon-polyline topological relation and we define a 16-intersection matrix that has been conceived to enhance and distinguish the semantics of cells’ content with respect to the well-known 9-intersection matrix. On the basis of such distinctions, we revise the geographic operators of GeoPQL and we give their formal semantics. In order to implement our proposed 16-matrix, we invoked in GeoPQL the open source Java libraries JTS Topology Suite, which conforms to the Simple Features Specification for SQL published by the Open GIS Consortium-OGC. Finally, the proposed 16-intersection matrix is illustrated through some query examples.

Keywords

Pictorial query languages topological relationships intersection matrix 

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Copyright information

© IFIP International Federation for Information Processing 2012

Authors and Affiliations

  • Anna Formica
    • 1
  • Mauro Mazzei
    • 1
  • Elaheh Pourabbas
    • 1
  • Maurizio Rafanelli
    • 1
  1. 1.National Research CouncilInstituto di Analisi dei Sistemi ed Informatica “Antonio Ruberti”RomeItaly

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