Projective relations in a 3d environment

  • Authors:
  • Roland Billen;Eliseo Clementini

  • Affiliations:
  • Geomatics Unit, University of Liege, Liege, Belgium;Dept. of Electrical and Information Engineering, University of L'Aquila, L'Aquila, Italy

  • Venue:
  • GIScience'06 Proceedings of the 4th international conference on Geographic Information Science
  • Year:
  • 2006

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Abstract

This paper presents a model for positional relations among bodies of arbitrary shape in three dimensions. It is based on an existing model for projective relations among regions in two dimensions. The motivation is to provide a formal qualitative spatial relations model for emerging 3D applications. Two sets of relations are defined: ternary projective relations based on the concept of collinearity between a primary object and two reference objects and quaternary projective relations based on the concept of coplanarity between a primary object and three reference objects. Four sets of JEPD relations are defined for points and bodies in R3.