Region connection calculus

The region connection calculus (RCC) is intended to serve for qualitative spatial representation and reasoning. RCC abstractly describes regions (in Euclidean space, or in a topological space) by their possible relations to each other. RCC8 consists of 8 basic relations that are possible between two regions:

  • disconnected (DC)
  • externally connected (EC)
  • equal (EQ)
  • partially overlapping (PO)
  • tangential proper part (TPP)
  • tangential proper part inverse (TPPi)
  • non-tangential proper part (NTPP)
  • non-tangential proper part inverse (NTPPi)

From these basic relations, combinations can be built. For example, proper part (PP) is the union of TPP and NTPP.

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