Topological relations between fuzzy regions
SAC '97 Proceedings of the 1997 ACM symposium on Applied computing
Recent Issues on Fuzzy Databases
Recent Issues on Fuzzy Databases
Imprecision in Finite Resolution Spatial Data
Geoinformatica
Diachronic Analysis of Fuzzy Objects
Geoinformatica
SSD '97 Proceedings of the 5th International Symposium on Advances in Spatial Databases
pg4DB: A fuzzy object-relational system
Fuzzy Sets and Systems
Qualified topological relations between spatial objects with possible vague shape
International Journal of Geographical Information Science
Linguistic modelling of imperfect spatial information as a basis for simplifying spatial analysis
Information Sciences: an International Journal
A dual representation of uncertain dynamic spatial information
IFSA'03 Proceedings of the 10th international fuzzy systems association World Congress conference on Fuzzy sets and systems
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In this contribution a fuzzy object-based data model for imperfect spatial information is proposed within the formal framework of fuzzy set theory and possibility theory. The proposal integrates the two opposite views of geographic entities seen as either exact objects or continuous fields in current Geographic Information Systems. By assuming a Fuzzy Object-Oriented Data modelling approach new data types for representing geographic entities characterized by either unsharp boundaries or indeterminate boundaries and relationships are defined.Linguistic qualifiers are adopted both to express the extent by which an element of the spatial domain satisfies a gradual property, and to identify regions with indeterminate boundaries.