Iconic indexing by 2-D strings
IEEE Transactions on Pattern Analysis and Machine Intelligence
A general method for spatial reasoning in spatial databases
CIKM '95 Proceedings of the fourth international conference on Information and knowledge management
Towards maintaining consistency of spatial databases
CIKM '97 Proceedings of the sixth international conference on Information and knowledge management
Mining multiple-level spatial association rules for objects with a broad boundary
Data & Knowledge Engineering
Algorithms for Hierarchical Spatial Reasoning
Geoinformatica
Integrated spatial reasoning in geographic information systems: combining topology and direction
Integrated spatial reasoning in geographic information systems: combining topology and direction
Similarity assessment for cardinal directions between extended spatial objects
Similarity assessment for cardinal directions between extended spatial objects
Composing cardinal direction relations
Artificial Intelligence
A scale-explicit model for checking directional consistency in multi-resolution spatial data
International Journal of Geographical Information Science
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The integration of topological and direction relations plays an important role in many applications, like spatial databases and pictorial retrieval systems. The method for deriving composition of binary topological relations cannot always yield unique or interesting results. Therefore, to integrate efficiently topological and direction relations, some new mechanisms are required to derive topological relations from direction cases when the above situations occur. This paper presents the computation methods for deriving topological relations from direction relations. The methods fall into two categories: the derivation of topological relations from one direction relation and two direction relations. Our methods can provide topological information when topological relations are unavailable, or more precise results are expected. Thus they are helpful in the integration of the calculi for topological and direction relations.