3456 search results - page 130 / 692 » Semantics in Spatial Databases |
131
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ADC
2003
Springer
15 years 7 months ago
2003
Springer
Selectivity estimation of queries not only provides useful information to the query processing optimization but also may give users a preview of processing results. In this paper,...
138
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ER
2008
Springer
15 years 4 months ago
2008
Springer
Abstract. Both Geographic Information Systems and Information Retrieval have been very active research fields in the last decades. Lately, a new research field called Geographic In...
104
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GEOINFORMATICA
2006
15 years 2 months ago
2006
Existing estimation approaches for spatial databases often rely on the assumption that data distribution in a small region is uniform, which seldom holds in practice. Moreover, the...
145
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ECRTS
2004
IEEE
15 years 6 months ago
2004
IEEE
In this paper we present a concurrency control algorithm that allows co-existence of soft real-time, relational database transactions, and hard real-time database pointer transact...
212
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GIS
2005
ACM
16 years 3 months ago
2005
ACM
The management of moving objects has been intensively studied in the recent years. A wide and increasing range of database applications has to deal with spatial objects whose posi...