4084 search results - page 61 / 817 » Constraints in spatial structures |
107
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DAGSTUHL
2007
15 years 1 months ago
2007
Constraint databases and geographic information systems share many applications. However, constraint databases can go beyond geographic information systems in efficient spatial and...
PODS
1999
ACM
15 years 4 months ago
1999
ACM
One of the most important types of query processing in spatial databases and geographic information systems is the spatial join, an operation that selects, from two relations, all...
APSEC
2003
IEEE
15 years 3 months ago
2003
IEEE
Today, the syntax of visual specification languages such as UML is typically defined using meta-modelling techniques. However, this kind of syntax definition has drawbacks. In par...
110
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AI
2005
Springer
14 years 11 months ago
2005
Springer
We present a formal model for qualitative spatial reasoning with cardinal directions utilizing a co-ordinate system. Then, we study the problem of checking the consistency of a se...
101
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EWSN
2006
Springer
15 years 11 months ago
2006
Springer
Abstract. We propose a lightweight localisation approach for supporting distance and range queries in ad hoc wireless sensor networks. In contrast to most previous localisation app...