Title :
Modifications of fuzzy directional queries for spatial databases
Author :
Cobb, Maria ; Petry, Frederick E. ; Wen, Lixong
Author_Institution :
Dept. Comput. Sci., Univ. of Southern Mississippi, Hattiesburg, MS, USA
Abstract :
A previously developed approach (M. Cobb and F. Petty, 1998) for determining directional and spatial relationships has been based on the partitioning of the Minimum Bounding Rectangle (MBR) that represents the underlying actual spatial object. This development took an approach which allowed a very computationally efficient determination of directions. However the simplifications caused some anomalous cases to possibly occur. The paper provides some modifications of the reference area and axis weight used to compute directions. This permits a better representation of the intuition of certain directional cases without being computationally inefficient
Keywords :
fuzzy set theory; geographic information systems; query processing; topology; visual databases; MBR; Minimum Bounding Rectangle partitioning; anomalous cases; axis weight; computational efficiency; directional cases; fuzzy directional queries; reference area; spatial databases; spatial object; spatial relationships; Computer science; Data structures; Database languages; Logic; Query processing; Spatial databases; USA Councils;
Conference_Titel :
IFSA World Congress and 20th NAFIPS International Conference, 2001. Joint 9th
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7078-3
DOI :
10.1109/NAFIPS.2001.944447
