Sciweavers

2298 search results - page 205 / 460
» Querying spatial patterns
Sort
View
SSDBM
2008
IEEE
177views Database» more  SSDBM 2008»
15 years 10 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
EDBT
2009
ACM
172views Database» more  EDBT 2009»
15 years 8 months ago
Continuous visible nearest neighbor queries
In this paper, we identify and solve a new type of spatial queries, called continuous visible nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query li...
Yunjun Gao, Baihua Zheng, Wang-Chien Lee, Gencai C...
GIS
2009
ACM
15 years 8 months ago
In-network query processing in mobile P2P databases
The in-network query processing paradigm in sensor networks postulates that a query is routed among sensors and collects the answers from the sensors on its trajectory. It works f...
Bo Xu, Fatemeh Vafaee, Ouri Wolfson
MIS
2001
Springer
148views Multimedia» more  MIS 2001»
15 years 8 months ago
Querying Images in the DISIMA DBMS
Because digital images are not meaningful by themselves, images are often coupled with some descriptive or qualitative data in an image database. Moreover the division of these da...
Vincent Oria, M. Tamer Özsu, Paul Iglinski
GEOINFORMATICA
2011
14 years 11 months ago
Functional description of geoprocessing services as conjunctive datalog queries
Discovery of suitable web services is a crucial task in Spatial Data Infrastructures (SDI). In this work, we develop a novel approach to the discovery of geoprocessing services (WP...
Daniel Fitzner, Jörg Hoffmann, Eva Klien