Resolution of Ambiguities in Query Interpretation for Geographical Pictorial Query Languages
نویسندگان
چکیده
منابع مشابه
GeoPQL: A Geographical Pictorial Query Language That Resolves Ambiguities in Query Interpretation
The main problem of visual query languages for geographical data concerns the query’s ambiguity. Ambiguity derives from the fact that a query can lead to multiple interpretations for both the system and user. In fact a query can have different visual representations, and these can themselves have different interpretations. Among the reasons leading to these ambiguities, one appears to be fundam...
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The main issues of spatial databases and Geographic Information System (GIS), concern the representation, the management and the manipulation of a large and complex number of spatial objects and spatial relationships. In these systems many concepts are spatial and, therefore they are intrinsically related with a visual representation, which makes also easier to formulate queries by non-expert u...
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A technique that enables specifying complex queries in image databases using pictorial query trees is presented. The leaves of a pictorial query tree correspond to individual pictorial queries that specify which objects should appear in the target images as well as how many occurrences of each object are required. In addition, the minimum required certainty of matching between query-image objec...
متن کاملQuery Processing and Optimization for Pictorial Query Trees
Methods for processing of pictorial queries speci ed by pictorial query trees are presented. Leaves of a pictorial query tree correspond to individual pictorial queries while internal nodes correspond to logical operations on them. Algorithms for processing individual pictorial queries and for parsing and computing the overall result of a pictorial query tree are presented. Issues involved in o...
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ژورنال
عنوان ژورنال: Journal of Computing and Information Technology
سال: 2004
ISSN: 1330-1136,1846-3908
DOI: 10.2498/cit.2004.02.07