64 search results - page 1 / 13 » Reasoning with Cardinal Directions: An Efficient Algorithm |
AAAI
2008
13 years 7 months ago
2008
Direction relations between extended spatial objects are important commonsense knowledge. Recently, Goyal and Egenhofer proposed a formal model, called Cardinal Direction Calculus...
AI
2005
Springer
13 years 4 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...
EDBT
2004
ACM
13 years 10 months ago
2004
ACM
Qualitative spatial reasoning forms an important part of the commonsense reasoning required for building intelligent Geographical Information Systems (GIS). Previous research has c...
SSD
2001
Springer
13 years 9 months ago
2001
Springer
Like people who casually assess similarity between spatial scenes in their routine activities, users of pictorial databases are often interested in retrieving scenes that are simil...
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
Cardinality estimation during query optimization relies on simplifying assumptions that usually do not hold in practice. To diminish the impact of inaccurate estimates during opti...