856 search results - page 25 / 172 » Location-based Spatial Queries |
SAC
2011
ACM
13 years 1 months ago
2011
ACM
Spatial networks like transportation, power, and pipeline networks are a ubiquitous spatial concept in everyday life and play an important role for navigational and routing purpos...
GIS
2010
ACM
13 years 9 months ago
2010
ACM
It is cost-effective for data owners to publicize their spatial databases via database outsourcing; however, data privacy and query integrity are major challenges. In this demonst...
EDBT
2004
ACM
14 years 11 months ago
2004
ACM
Despite the existence of obstacles in many database applications, traditional spatial query processing utilizes the Euclidean distance metric assuming that points in space are dire...
ISCI
2007
13 years 10 months ago
2007
In an object-relational database management system, a query optimizer requires users to provide cost models of userdefined functions. The traditional approach is analytical, that...
ICDE
2007
IEEE
14 years 5 months ago
2007
IEEE
With the proliferation of mobile devices (e.g., PDAs, cell phones, etc.), location-based services have become more and more popular in recent years. However, users have to reveal ...