2674 search results - page 15 / 535 » Data Models and Query Languages for Spatial Databases |
DEXAW
2000
IEEE
13 years 12 months ago
2000
IEEE
Current models for cardinal directions, such as north and northeast, are either point-based or region-based, but no models exist that apply equally, independent of the geometric d...
GIS
1998
ACM
13 years 7 months ago
1998
ACM
Spatial relations are the basis for many selections users perform when they query geographic information systems (GISs). Although such query languages use natural-language-like te...
CAISE
1998
Springer
13 years 11 months ago
1998
Springer
We show how model extensibility of object-oriented data management systems can be achieved through the combination of a highlevel core object data model and an architecture designe...
WWW
2004
ACM
14 years 8 months ago
2004
ACM
This paper describes a query algebra for queries over XML p2p databases that provides explicit mechanisms for modeling data dissemination, replication constraints, and for capturi...
ER
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. Topological relationships between spatial objects in the twodimensional space have been investigated for a long time in a number of disciplines like artificial intellige...