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ER
2009
Springer
117views Database» more  ER 2009»
15 years 24 days ago
An Ontology-Based Framework for Geographic Data Integration
Ontologies have been extensively used to model domain-specific knowledge. Recent research has applied ontologies to enhance the discovery and retrieval of geographic data in Spatia...
Vânia Maria Ponte Vidal, Eveline R. Sacramen...
SIGMOD
2008
ACM
210views Database» more  SIGMOD 2008»
15 years 9 months ago
Private queries in location based services: anonymizers are not necessary
Mobile devices equipped with positioning capabilities (e.g., GPS) can ask location-dependent queries to Location Based Services (LBS). To protect privacy, the user location must n...
Gabriel Ghinita, Panos Kalnis, Ali Khoshgozaran, C...
SIGMOD
2007
ACM
196views Database» more  SIGMOD 2007»
15 years 9 months ago
Adaptive location constraint processing
An important problem for many location-based applications is the continuous evaluation of proximity relations among moving objects. These relations express whether a given set of ...
Zhengdao Xu, Hans-Arno Jacobsen
DEXA
1997
Springer
137views Database» more  DEXA 1997»
15 years 1 months ago
A Retrieval Mechanism for Semi-Structured Photographic Collections
Abstract. In this paper, a new approach for retrieval from semistructured photographic collections is described. We have developed a retrieval model based on the Dempster-Shafer th...
Joemon M. Jose, David J. Harper
SSDBM
2008
IEEE
177views Database» more  SSDBM 2008»
15 years 3 months ago
Prioritized Evaluation of Continuous Moving Queries over Streaming Locations
Abstract. Existing approaches to the management of streaming positional updates generally assume that all active user requests have equal importance, ignoring the possibility of an...
Kostas Patroumpas, Timos K. Sellis