Identifying topological predicates for vague spatial objects

Many geographical applications deal with spatial objects that cannot be adequately described by determinate, crisp concepts because of their intrinsically indeterminate and vague nature. GIS and spatial database systems are currently unable to handle this kind of data. Based on recent work on vague spatial data types, which are part of a formal data model called VASA (Vague Spatial Algebra) and which leverage exact models of crisp spatial data types, this paper introduces a general mechanism for identifying topological predicates for vague spatial objects by means of topological predicates for crisp spatial objects. We illustrate this mechanism by deducing these predicates for vague points. Categories and Subject Descriptors H.2.8 [Database Applications]: Spatial Databases and GIS General Terms Design Keywords Vague spatial data type, VASA, three-valued logic, cancellation rule, clustering rule, query language

• Type: Conference
• Year: 2005
• Where: SAC
• Authors: Alejandro Pauly, Markus Schneider
• Keywords: Applied Computing, SAC 2005, Spatial, Spatial Data Type, Vague Spatial Data