Paper Info
Title
Web services for accuracy-based spatial query rewriting in a wrapper-mediator system.
Abstract
Web-based federated spatial databases usually do not support accuracy-aware query processing despite growing availability of individual data quality descriptions. This paper introduces a mechanism for making data quality information operational through the process of accuracy-based query rewriting. A number of keywords are added to SQL to express accuracy constraints in a spatial query. Depending on the specification of error in underlying data sets, a query containing accuracy constraints is rewritten as a single or a set of crisp spatial queries, i.e. those that do not require further accuracy-based disambiguation. The rewriting uses binding of GIS spatial operations to error models via a collection of error propagation templates. This mechanism is implemented as a Web service that works in conjunction with a spatial mediator to aid in rewriting spatial queries in the presence of accuracy metadata.
Year
Venue
Keywords
2003
WISE Workshops
web-based federated spatial databases,data quality information,accuracy-aware query processing,spatial mediator,accuracy-based query,accuracy-based spatial query,gis spatial operation,spatial query,accuracy metadata,crisp spatial query,wrapper-mediator system,web service,accuracy constraint,information operations,data quality,spatial database,internet,geographic information systems,distributed databases,meta data,error propagation
Field
DocType
ISBN
SQL,Query optimization,Web search query,Data mining,Query language,Information retrieval,Query expansion,Computer science,Web query classification,Spatial query,Web service,Database
Conference
0-7695-2103-7
Citations 
PageRank 
References 
0
0.34
10
Authors
3
Name
Order
Citations
PageRank
Vivek Manpuria100.34
Ilya Zaslavsky218718.51
Chaitan Baru310220.59