52 search results - page 1 / 11 » Towards a Theory of Spatial Database Queries |
PODS
1994
ACM
13 years 9 months ago
1994
ACM
ICDE
2009
IEEE
14 years 6 months ago
2009
IEEE
This work addresses a novel spatial keyword query called the m-closest keywords (mCK) query. Given a database of spatial objects, each tuple is associated with some descriptive inf...
TIME
2000
IEEE
13 years 9 months ago
2000
IEEE
We present a data model for movies and movie databases. A movie is considered to be a 2-dimensional semialgebraic figure that can change in time. We give a number of computabilit...
SSD
2001
Springer
13 years 9 months ago
2001
Springer
Several studies have focused on the efficient processing of simple spatial query types such as selections and spatial joins. Little work, however, has been done towards the optimiz...
PODS
1993
ACM
13 years 9 months ago
1993
ACM
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...