A general approach to parameter evaluation in fuzzy digital pictures
Pattern Recognition Letters
A topological data model for spatial databases
SSD '90 Proceedings of the first symposium on Design and implementation of large spatial databases
Qualitative spatial reasoning: a semi-quantitative approach using fuzzy logic
SSD '90 Proceedings of the first symposium on Design and implementation of large spatial databases
An introduction to spatial database systems
The VLDB Journal — The International Journal on Very Large Data Bases - Spatial Database Systems
Uncertainty Management for Spatial Data in Databases: Fuzzy Spatial Data Types
SSD '99 Proceedings of the 6th International Symposium on Advances in Spatial Databases
A Design of Topological Predicates for Complex Crisp and Fuzzy Regions
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
Topological Relationships of Complex Points and Complex Regions
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
A system of types and operators for handling vague spatial objects
International Journal of Geographical Information Science
Estimation of Geographic Relevance for Web Objects Using Probabilistic Models
W2GIS '08 Proceedings of the 8th International Symposium on Web and Wireless Geographical Information Systems
K-nearest neighbor search for fuzzy objects
Proceedings of the 2010 ACM SIGMOD International Conference on Management of data
Spatial query processing for fuzzy objects
The VLDB Journal — The International Journal on Very Large Data Bases
Linear fuzzy space based road lane model and detection
Knowledge-Based Systems
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For a long time topological relationships between spatial objects have been a main focus of research on spatial data handling and reasoning. They have especially been integrated into query languages of spatial database systems and geographical information systems. One of their fundamental features is that they operate on spatial objects with precisely defined, sharp boundaries. But in many geometric and geographic applications there is a need to model spatial phenomena and their topological relationships rather through vague or fuzzy concepts due to indeterminate boundaries. This paper presents a model of fuzzy regions and focuses on the definition of topological predicates between them. Moreover, some properties of these predicates are shown, and we demonstrate how the predicates can be integrated into a query language.