52 search results - page 8 / 11 » Towards a Theory of Spatial Database Queries |
VLDB
2009
ACM
14 years 7 months ago
2009
ACM
In this paper, we study the problem of continuous monitoring of reverse k nearest neighbor queries. Existing continuous reverse nearest neighbor monitoring techniques are sensitive...
SSD
1997
Springer
13 years 11 months ago
1997
Springer
Abstract: In many geographical applications there is a need to model spatial phenomena not simply by sharp objects but rather through indeterminate or vague concepts. To support su...
MDM
2007
Springer
14 years 1 months ago
2007
Springer
This work tackles the problem of answer-aggregation for continuous spatio-temporal range queries in distributed settings. We assume a grid-like coverage of the spatial universe of...
CHI
1995
ACM
13 years 11 months ago
1995
ACM
ld is a prototype IR user interface. It implements visualizations of an abstract information space – fulltext. The presentation demonstrates a visual user interface for the prob...
GIS
2008
ACM
13 years 8 months ago
2008
ACM
One of the formalisms to qualitatively describe polylines in the plane are double-cross matrices. In a double-cross matrix the relative position of any two line segments in a poly...