Oriented Point Relation Algebra

The Oriented Point Relation Algebra (OPRA) serves for qualitative spatial representation and reasoning. OPRA is an orientation calculus with adjustable granularity. OPRA is based on objects which are represented as oriented points. Oriented points are specified as pair of a point and a direction on the 2D-plane.

References

Till Mossakowski, Reinhard Moratz (2012). Qualitative Reasoning about Relative Direction of Oriented Points. Artificial Intelligence Journal, Vol. 180–181, pp. 34–45.

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