Λεπτομέρειες

ΕίδοςΔημοσίευση
ΚωδικόςTR-2005-5
ΤίτλοςOn the Consistency of Cardinal Directions Constraints
ΣυγγραφέαςSkiadopoulos, S. and Koubarakis, M.
Έτος2005
Λέξεις κλειδιά-
ΠερίληψηWe present a formal model for qualitative spatial reasoning with cardinal directions utilizing a coordinate system. Then, we study the problem of checking the consistency of a set of cardinal direction constraints. We introduce the first algorithm for this problem, prove its correctness and analyze its computational complexity. Utilizing the above algorithm, we prove that the consistency checking of a set of basic (i.e., non-disjunctive) cardinal direction constraints can be performed in O(n^5) time. We also show that the consistency checking of a set of unrestricted (i.e., disjunctive and non-disjunctive) cardinal direction constraints is NP-complete. Finally, we briefly discuss an extension to the basic model and outline an algorithm for the consistency checking problem of this extension.
ΚατηγορίαSpatial DBMS
ΔημοσίευσηArtificial Intelligence


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