Region Connection Calculus 2

Description

Region Connection Calculus (RCC) [1] [2] 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.

RCC2 is the simplest form of RCC and consists of 2 basic relations that are possible between two regions. It is a stripped down version of RCC8. The mapping from RCC8 to RCC2 can be seen below:

RCC8 RCC2
dc dc
ec c
po
tpp
ntpp
eq
tppi
ntppi

Relations

All the possible RCC5 relations between a blue object X and a red object Y are:

Relation Illustration Interpretation
X dc Y ../../../_images/rcc8_dc.png X is disconnected from Y.
X c Y ../../../_images/rcc8_ec.png X is connected to Y.
../../../_images/rcc8_po.png
../../../_images/rcc8_tpp.png
../../../_images/rcc8_ntpp.png
../../../_images/rcc8_eq.png
../../../_images/rcc8_tppi.png
../../../_images/rcc8_ntppi.png

API

The API can be found here.

References

[1]Randell, D. A., Cui, Z. and Cohn, A. G.: A spatial logic based on regions and connection, Proc. 3rd Int. Conf. on Knowledge Representation and Reasoning, Morgan Kaufmann, San Mateo, pp. 165–176, 1992. (link)
[2]Anthony G. Cohn, Brandon Bennett, John Gooday, Micholas Mark Gotts: Qualitative Spatial Representation and Reasoning with the Region Connection Calculus. GeoInformatica, 1, 275–316, 1997.