Crisp spatial data are geometric features with exact location on the extent and well-known boundaries. On the other hand, vague spatial data are characterized by inaccurate locations or uncertain boundaries. Despite the im- portance of vague spatial data in spatial applications, few related work indeed implement vague spatial data and they do not define abstract data types to en- able the management of vague spatial data by using database management sys- tems. In this sense, we propose the abstract data type FuzzyGeometry to handle vague spatial data based on the fuzzy model. FuzzyGeometry was developed as a PostgreSQL extension and its implementation is open source. It offers man- agement for fuzzy points and fuzzy lines. As a result, spatial applications are able to access the PostgreSQL to handle vague spatial objects.
['Anderson Chaves Carniel', 'Ricardo Rodrigues Ciferri', 'Cristina Dutra de Aguiar Ciferri']
An Abstract Data Type to Handle Vague Spatial Objects Based on the Fuzzy Model