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Publication type: Article
Author: Reinhard Moratz, Dominik Lücke, Till Mossakowski
Title: Oriented Straight Line Segment Algebra: Qualitative Spatial Reasoning about Oriented Objects
Volume: abs/0912.5533
Journal: CoRR
Year published: 2009
Abstract: Nearly 15 years ago, a set of qualitative spatial relations between oriented straight line segments (dipoles) was suggested by Schlieder. This work received substantial interest amongst the qualitative spatial reasoning community. However, it turned out to be difficult to establish a sound constraint calculus based on these relations. In this paper, we present the results of a new investigation into dipole constraint calculi which uses algebraic methods to derive sound results on the composition of relations and other properties of dipole calculi. Our results are based on a condensed semantics of the dipole relations.

In contrast to the points that are normally used, dipoles are extended and have an intrinsic direction. Both features are important properties of natural objects. This allows for a straightforward representation of prototypical reasoning tasks for spatial agents. As an example, we show how to generate survey knowledge from local observations in a street network. The example illustrates the fast constraint-based reasoning capabilities of the dipole calculus. We integrate our results into two reasoning tools which are publicly available.
Internet: http://arxiv.org/abs/0912.5533
PDF Version: http://arxiv.org/pdf/0912.5533v1
Keywords: qualitative spatial reasoning dipole calculus relation algebra
Note / Comment: abs/0912.5533
Status: Other
Last updated: 05. 01. 2010

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